do you figure the hips and ridge extra on a tile roof

ROBERTS Said: the job is based on a per sq. foot price not an actual bid. now they dont want to pay for the ridge or hips or the waste. they estimated the sq. footage and i have to show that they need to add hips and ridge too. they only want to pay for flat roof area

Then only do the "flat roof area". I'm with TomB, I really don't see the issue here. You get what you pay for comes to mind.

If you're quoting an 'average' price per square, if it's truly average, you're safe on the half of all jobs easier or less cut-up than average. It's those jobs with more than average trim that you will need to compensate for.

Depending on the job, site, tile profile, budget, I have 4 different options for hip closure. They range (including trim) from $4 per foot to $8.50 per foot. If someone demanded a job be done at the average price per square, they ain't getting the $8.50 per foot option.