Hi ,
I assume that the formula in the 3 cells you have mentioned would be on the same lines as the formulae in the other cells ; however , the formulae you have posted against the cell addresses are all partial formulae ; they are not complete.
I think what has happened is that someone has pressed F2 , F9 , so that the formulae in those cells have been replaced by their values ; the only way you can put back formulae in those cells is to have the full formulae.
Secondly , all the formulae in row 6 are referring to cells in row 5 ; I do not know why you have shown the formulae in the 3 cells referring to cells in row 50 ; is this correct ?
Lastly , there are too many IF functions used ; it would be better if you could set up a lookup table , and use either a VLOOKUP or LOOKUP or INDEX/MATCH to simplify the formula.
Narayan