Revisamos el coste.

Revisamos is the first-person plural form of revisar, so it means we do the action.

A very important point: this form can be either:

• present indicative: we review / we check
• preterite: we reviewed / we checked

That happens because for many -ar verbs, the nosotros form is the same in those two tenses. Only context tells you which one is meant.

For example:

• Cada semana revisamos el coste. = present
• Ayer revisamos el coste. = past

Spanish often leaves out subject pronouns because the verb ending already shows who the subject is.

So revisamos already tells you the subject is we.

• Revisamos el coste. = normal, natural
• Nosotros revisamos el coste. = also correct, but more emphatic

You would usually add nosotros only if you want contrast, emphasis, or clarity.

Not exactly.

In many everyday contexts, revisar means:

• to check
• to look over
• to review
• to inspect

So in this sentence, it usually has the sense of checking/reviewing something.

It can sometimes overlap with English revise, especially in the sense of going over something carefully, but it is very often broader and more practical than the English word. So it is best not to assume it always means revise.

Spanish often uses the definite article where English might or might not use the.

Here, el coste means a specific cost that both speaker and listener can identify, so the article is natural.

Without the article, coste would usually sound incomplete or unnatural in this sentence.

So:

• Revisamos el coste. = natural
• Revisamos coste. = generally not correct here

Because coste is a masculine noun, so it takes el.

This is something you have to learn with the noun:

• el coste
• el precio
• la tarifa

A useful reminder: nouns ending in -e are not automatically masculine or feminine. You have to learn their gender individually.

In Spain, coste is very common and natural.

A few distinctions:

• coste = cost, often the expense involved
• costo = also means cost, but is more common in many parts of Latin America
• precio = price, especially the amount something is sold for

So in Spain, el coste is a very normal choice.

Because el coste is a direct object referring to a thing, not a person.

Spanish uses the personal a mainly with specific people:

• Vemos a María.
• Revisamos el coste.

Since coste is not a person, there is no a.

The sentence uses the most neutral word order for Spanish:

• Revisamos el coste.

That is completely normal.

You can also say:

• Nosotros revisamos el coste.

But that adds emphasis to we.

You could move el coste to the front, but that would sound marked or contrastive, not neutral:

• El coste lo revisamos mañana.

So the original sentence is the straightforward, standard way to say it.

Yes. Revisar is a regular -ar verb.

Its nosotros form is made like this:

• infinitive: revisar
• stem: revis-
• ending: -amos
• result: revisamos

That regular pattern is one reason why this form is easy to recognise, even though it is still ambiguous between present and preterite.