Contractor charged us 6.25% tax on new home in NM. Is this deductible as sales tax since he computed it on material as well as on profit and overhead too.

I am trying to determine if the 6.25% can be itemized on Sch. A as sales tax. In New Mexico, we have Gross Receipts tax which is similar to sales tax but includes services as well as goods. Talking about $25,000 dollar possible deduction, so it's pretty major. I appreciated your replies.