Цена включает всё, включая доставку.

They come from the same verb, включать (to include), but they play different grammatical roles here.

• включает = includes
  This is a finite verb, 3rd person singular present tense.

  • Цена включает всё = The price includes everything

• включая = including
  This is a verbal adverb / preposition-like form meaning including. It adds extra detail:

  • включая доставку = including delivery

So the sentence is built like this:

• Цена включает всё = main statement
• включая доставку = added clarification

English does the same thing: The price includes everything, including delivery.

Because цена means price, and it is a singular feminine noun.

The verb must agree with the subject:

• цена = singular
• therefore включает = singular

Compare:

• Цена включает всё. = The price includes everything.
• Цены включают всё. = The prices include everything.

So включает is singular simply because the subject цена is singular.

Because всё means everything, while все usually means all / everyone.

Here you need everything, so Russian uses всё.

Compare:

• всё = everything
• все = all people / all items in a group, depending on context

Examples:

• Я знаю всё. = I know everything.
• Все пришли. = Everyone came.
• Все книги здесь. = All the books are here.

So in Цена включает всё, the meaning is The price includes everything, not The price includes all.

Всё is in the accusative case because it is the direct object of включает.

Ask the question:

• Цена включает что? = The price includes what?
• Answer: всё

For neuter inanimate pronouns like всё, the accusative looks the same as the nominative, so the form does not change.

That is why you see:

• всё as the thing being included

Because доставку is also in the accusative case.

The word доставка means delivery in the nominative form. But after включая in this sentence, Russian uses the thing being included in the accusative:

• доставка = nominative
• доставку = accusative singular

So:

• включая доставку = including delivery

This is very common with feminine nouns ending in -а:

• nominative: книга
• accusative: книгу

Likewise:

• nominative: доставка
• accusative: доставку

In this kind of usage, yes, it normally takes the accusative.

Examples:

• включая налог = including tax
• включая завтрак = including breakfast
• включая доставку = including delivery

So if you want to add something to a list or clarify what is included, включая is followed by the accusative noun.

The comma separates the main statement from the added clarification.

Main statement:

• Цена включает всё

Additional detail:

• включая доставку

This works a lot like English:

• The price includes everything, including delivery.

In Russian, this extra including ... phrase is often set off with a comma, especially when it is added as an explanatory element after the main clause.

No. It is not a full clause by itself.

A full clause normally has its own subject and finite verb. Here, the full clause is:

• Цена включает всё

But включая доставку does not have its own subject like the price and does not have a finite verb like includes. It is just an added phrase meaning including delivery.

So it depends on the main clause and cannot stand alone in the same way.

Yes, Russian could express the same idea in other ways. For example:

• Цена включает всё, в том числе доставку.
• В цену входит всё, включая доставку.

These are natural alternatives.

But Цена включает всё, включая доставку is also perfectly normal. Repeating the same root idea (include / including) is not strange here, just as it is not strange in English:

• The price includes everything, including delivery.

Both can be used to talk about what is included, but they are built differently.

• Цена включает всё
  Literally: The price includes everything

  • subject = цена
  • verb = включает
  • direct object = всё

• В цену входит всё
  Literally: Into the price enters everything More naturally: Everything is included in the price

  • в цену = into/in the price
  • входит = enters / is included

So the meaning is very similar, but the grammar changes:

• включать что-то = to include something
• входить во что-то = to be included in something

Включать is the imperfective verb. Its perfective partner is включить.

Here the sentence states a general fact about the price, so Russian uses the imperfective present:

• Цена включает всё. = The price includes everything.

This is not about a one-time completed action like included once and finished. It is a general description of what the price covers.

Compare:

• включать = to include, be including, include habitually / generally
• включить = to include once, add in, include as a completed action

For a product description, advertisement, or policy statement, включает is the normal choice.

Всё is pronounced roughly like vsyo.

The letter ё is important for pronunciation here because:

• всё = everything
• if you write все, that usually suggests all / everyone

In many Russian texts, ё is often replaced by е, so you may see все where the meaning is actually всё. Native speakers usually understand from context.

But for learners, it is very helpful to keep ё when writing:

• всё = everything

So in study materials, dictionaries, and careful writing, writing ё is a good idea.

Yes, Russian word order is flexible, though some versions sound more natural than others.

The original:

• Цена включает всё, включая доставку.

This is the most straightforward and neutral version.

Possible variations:

• Всё, включая доставку, входит в цену.
• Цена, включая доставку, покрывает всё.
  (This one changes the wording a bit)

Russian often moves parts around for emphasis. For example:

• Всё, включая доставку, входит в цену puts more focus on everything
• Цена включает всё starts with the price, which is natural in many practical contexts

So yes, the word order can change, but the original sentence is a very standard, neutral way to say it.