if, nested if, if(and) logic

I have the attached file I am hoping someone can help me reason out a formula change for. What I am trying to do is say when any cell in range G11:U11 is 6200 or greater then I need to somehow account for the extra time in cell B18 into the formula in cell D25 which is:

[code]
=IF(R20<=TIME(10,0,0),R20,IF(AND((R20)>TIME(10,0,0),R20<=TIME(11,45,0)),R20+TIME(0,B14,0),IF(AND((R20)>=TIME(12,0,0),R20+TIME(1,0,0)<TIME(14,30,0)),B25+TIME(0,F16+60,0)+TIME(0,B14,0),IF((TIME(0,F16,0)+B25)>TIME(14,30,0),TIME(14,30,0),TIME(14,30,0)))))
[\code]

I hope this is understandable. I would put it in psudo code but I am not sure of the logistic of how to account to the cutter flip time in cell B18 in the D25 cell.