At least to me, it is unclear what your numbers mean and what you want to evaluate.
"Construction: 83% Variance"
Is that some variance in some costs, for example? % relative to what?
"Weighted Average - 22%"
That is the weight of the materials value. Where does it come from? It changed later?
What do you want to calculate? The weighted average with the new numbers? This would just be 83%*0.36+99%*0.38+94%*0.26=91.94%
However, I am not sure whether that value has any meaning.