Measurements
Just like their male counterparts, many Australian women earn money 2,000 dollars per month.
Bahasa Indonesia has this kind of labelling: dapat uang 2,000 dolar per bulan.
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Units used to measure many different things
If a unit like kg can be used as a measurement of more than one thing, then you need to specify the thing:
Shopkeeper:
Good morning. Can I help you?
Customer:
I’d like 2kg of rice, please.
In this example, kg can be used to measure many other things: potatoes, chocolate, etc, and so it is necessary to be specific about rice.
Units used to measure only one thing
On the other hand if the unit can only be used to measure a single thing, unambiguously, for example dollars, then there’s no need to mention that thing:
Bank teller:
Good morning. Can I help you?
Customer:
I’d like to withdraw 1,000 dollars, please.
In this example, dollars is a label used only for money, and so the word money is redundant in the phrase 1,000 dollars of money.
If we apply this to the original problem then we get:
Just like their male counterparts, many Australian women earn 2,000 dollars per month.