Formula based on Date

Hello,

I need help to create a formula based on date. There are amounts which are received for 12 months period and only 1/24th of the amount is earned in one month. The amounts received are based on date.

For example the amount received in Jan 2017 is 2,500 and the amount earned in Jan -2017 is 1/24th, in Feb-2017 is 3/24th, in March 5/24th and so on until Dec 2017. I am manually looking at date and then copying the formula.

Is there any way that one formula can be used for any date. I have attached the spreadsheet for an example.

Thanks,
Jai