Splitting One Value Into Two Separate Values In Sequence

I'm building a work schedule based on 12 hour days and I would like to separate a full weeks hours, 84 total, into the Regular hours and the Overtime hours that the employee will be paid. The way it is set up is I have 1 spread sheet that has the schedule for a full year (using "IN" as a working day and leaving the cell blank as a day off) and on a 2nd page I've set up with a COUNTIF formula to total the number of days worked (IN) during each pay period and then it multiplies the number of days by 12 to get the total hours.

Where I am having trouble is that the employees are paid Regular hours and OT hours in a single day and I don't know how to separate the total hours automatically into those two types of pay. For the first 5 days of their shift they are paid 8 hours of Regular time and 4 hours of OT time, and the last 2 days of the shift they are paid 12 hours of overtime. In a total of 7 days they will get 40 hours of Regular time and 44 hours of OT time.

To break this down into simple formulas, ie. (84 -40 = 44), won't work because if an employee works more than their 7 days the pattern they are paid restarts again with the 8 hours of Regular time and 4 hours of OT time and etc. (8 total days would be 48 hours of Regular time and 48 hours of OT time, max of 14 days per pay period).

Is there a formula out there that can break a number down in sequence (8-4-8-4-8-4-8-4-8-4-12-12) and total them in two different cells?