Ang cashier ay nasa gitna ng sangay.

Ang is a topic marker. In a sentence like this, it marks cashier as the main topic or subject-like part of the sentence.

It often lines up with English the, but it is not exactly the same thing.
So in Ang cashier ay nasa gitna ng sangay, ang cashier is the thing being talked about: the cashier.

Ay is used in a common Filipino sentence pattern where the topic comes first, followed by the rest of the sentence.

So:

• Ang cashier ay nasa gitna ng sangay.

This has the structure:

• Topic + ay + comment

A very common alternative is:

• Nasa gitna ng sangay ang cashier.

That version is often more natural in everyday speech. The ang ... ay ... pattern can sound a bit more formal or written.

Filipino often does not need a separate verb like English is/are in this kind of sentence.

Instead, nasa already gives the idea of is located at/in.

So English says:

• The cashier is in the middle of the branch.

But Filipino can say it without a separate word for is:

• Ang cashier ay nasa gitna ng sangay.

So the location expression itself carries the meaning that English would split into is + in.

Nasa means is in / is at / is on, depending on context. It is used for location.

In this sentence:

• nasa gitna = is in the middle

So nasa tells you where someone or something is located.

You can think of it as stronger than just sa, which often just means in/at/on/to as a general location marker.
Here, nasa works naturally as the predicate of the sentence.

Sa is a basic location marker, often meaning in, at, on, to.

Examples:

• sa bahay = at home / to the house
• sa mesa = on the table

Nasa is typically used when saying that someone or something is located somewhere.

So:

• Ang cashier ay nasa gitna ng sangay. = natural
• Ang cashier ay sa gitna ng sangay. = generally not the normal way to say it

In other words, nasa is the form you usually want when the sentence means is in/at a place.

Gitna means middle or center.

The phrase ng sangay means of the branch.

So:

• gitna ng sangay = the middle of the branch

Here, ng links gitna to sangay.
A good way to understand it is:

• gitna = middle
• ng sangay = of the branch

This is a very common pattern in Filipino:

• pinto ng bahay = door of the house
• kulay ng kotse = color of the car
• gitna ng sangay = middle of the branch

Sangay means branch, such as a branch of a business, office, bank, or store.

So in this sentence, it refers to a branch location, not a tree branch.

Depending on context, sangay can also mean a division or subdivision of an organization, but here it most naturally means a physical branch office or branch store.

Yes. Cashier is a normal and very common English loanword in Filipino.

Filipino often uses English-derived words in everyday speech, especially for jobs, business, and modern life.

You may also hear:

• kahera = female cashier
• kahero = male cashier

But cashier itself is very common and natural.

Yes, absolutely.

In fact, that order is often more natural in everyday Filipino:

• Nasa gitna ng sangay ang cashier.

This puts the location phrase first and the topic after it.

Both are correct:

• Ang cashier ay nasa gitna ng sangay.
• Nasa gitna ng sangay ang cashier.

A simple way to think about the difference:

• Ang cashier ay ... = more topic-first, sometimes more formal or explanatory
• Nasa gitna ... ang cashier = very common, natural predicate-first order

In this sentence, ang cashier is most naturally understood as the cashier because ang marks a specific topic.

However, Filipino does not match English articles exactly.
It is better to think of ang as a marker showing this is the main noun being talked about, rather than as a perfect equivalent of the.

So while the English translation usually uses the cashier, the real job of ang is grammatical marking, not simply article meaning.