Thanks for the quick reply. I have read other threads on this site regarding VEQs, but not link you provided.
In general terms, we agree that amount of work for the three supporting items was fixed, there are some caveats to that but not worth going into. I was thinking that if they could prove what their actual costs were for the fixed items of work, we could figure out what their actual "loss" was by doing this:
[actual costs for fixed items of work / actual under-run qyt. ] - [actual costs for fixed items of work / contract qyt.] = unrecovered unit cost
unrecovered unit cost x [85% of contract qyt. - actual qyt.] = equitable adjustment amount
Does that seem right?
Also, we have learned a lesson about incorporating fixed quantity items with variable quantity items in one line item....