Isulat ang halaga ng luho sa listahan; sapat ba ang pera?

This is about Filipino verb focus. Sumulat is actor-focus, so it emphasizes the person doing the writing, as in Write! / Do some writing!
Isulat is object-focus, so it emphasizes the thing being written. Since the sentence is telling you to write a specific thing, ang halaga ng luho, isulat is the natural choice.

In Filipino, commands often leave out the subject if it is obvious. English often does the same: Write it down also has an understood you.
If you wanted to make you explicit, you could say Isulat mo ang halaga ng luho sa listahan.

Here, ang is a marker, not simply the English article the. It marks the focused noun phrase in the sentence.
Because isulat is object-focus, the thing being written is marked with ang: ang halaga ng luho.

Here, ng works a lot like of in English. So halaga ng luho means the value/amount/cost of luxury or of luxuries.
It connects halaga with luho and shows what kind of amount or value is being talked about.

It can mean any of those depending on context: value, worth, amount, or cost. In this sentence, amount or cost is probably the most natural interpretation.
So a learner should not expect halaga to match only one English word every time.

Luho means luxury, indulgence, or non-essential spending. It usually refers to something nice but not necessary.
In context, it can mean luxury expenses or money spent on luxuries. Filipino nouns do not always need a special plural form, so luho can sometimes be understood broadly without adding mga.

Sa listahan means on the list or in the list, depending on how natural the English sounds in context. Sa is a very common marker for location, destination, or place.
So the phrase tells you where to write the amount: onto the list.

Ba is a question particle used for yes/no questions. Without ba, Sapat ang pera is a statement: The money is enough.
With ba, it becomes Is the money enough?

Filipino often puts the predicate first. Here, sapat comes first, and ang pera follows it. That is a very normal sentence pattern.
Also, ba usually goes after the first element, so sapat ba ang pera is the expected order. A more formal-looking alternative like Ang pera ay sapat ba? is much less natural here.

It depends on context, but here it usually means the relevant money or available funds, not money in the abstract. So English might naturally translate it as the money, the funds, or the budget.
Because pera is a mass noun, it does not need a plural ending like English sometimes does.

As written, it is a neutral instruction followed by a question. It is not rude, but it is not especially polite either.
To make it more polite, you could add po or use paki-, for example: Pakisulat po ang halaga ng luho sa listahan; sapat ba ang pera?