Multiperiod invoice accrual based on user defined amount

Summary:

How to create MPA invoice and accrue it based on user defined amount without a formula?

Below is an example:

Prepaid Amount of USD 50,000 with 5 months accrual. And, every month user can use a particular sum of amount and move it from accrual to expense.

1st Jan 2024- Paid lump-sum amount of Rs 50,000

31st Jan 2024- Used Rs 5,000; move it from accrual to expense.

28th Feb 2024- Used Rs 5,000; move it from accrual to expense.

31st Mar 2024- Used Rs 25,000; move it from accrual to expense.

30th April 2024- Used Rs 10,000; move it from accrual to expense.

31st May 2024- Used Rs 5,000; move it from accrual to expense.