PCR for Overtime Configuration

Hi Experts,

Kindly suggest PCR for below condition.

[(Basic Salary/30) /8 ] x 2 ] * no of hours worked as overtime.

1. i.e Basic Salary is divided by 30(calendar days)/ divided by 8(no of hours),double rate as per act needs to be paid * no of Overtime.

This needs to be paid monthly basis.

1. E.g. Ram has basic salary of 20000 for month of Jan. and has worked overtime for 4 hours in Jan.

{[(20000/31)/8] * 2 } * 4 = 645 Rs Needs to paid as overtime with month salary

I Have Created Wage type for the same but don't know how to set these conditions in PCR.