Please check my usage of prepositions

[Curious Cat]

Hello guys,
I'd appreciate it if you check the way I use the prepositions with money-spending terms
Expenses AT/FOR
Spending ON
Costs OF
Expenditures ON
And: Price OF (the product)
I am afraid that I can mix them up which is not good when speaking about spending others' money
Thanks.

[Tdol]

They're fine, but 'expenses' can have different prepositions- what do you want to say with it?

[Curious Cat]

Just the same as in all the other cases - that I spend money on something, and this is called my expenses. What's the difference between these two prepositions with the word 'expenses'? I thought they could replace each other, could they not?

[Tdol]

Then I'd use 'on'. At/for both suggest things like time or place to me here.

[Curious Cat]

Ok, I trust you Thanks!


CC