Is there a way to prorate rates using values defined by criteria

Summary:

Currently we are using UDT to store union rates based on Band

BAND RATE

A 2

B 4

C 6

Band rates can be changed during the pay period and we want to enable proration on Union Value calculation

for ex Band A rate changed from 2 to 2.5 in middle of monthly payroll and Employee Earnings is 1000

then Union value should be 1000* 2%/2 + 1000 * 2.5% /2 = 22.5

Is there any way to achieve above requirement using Values defined by criteria.

it would be very helpful if you can share your valuable inputs

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