I own a glass business and buy sheets of glass that I later cut down to specific sizes and resell for different jobs. For the sake of convenience lets say I buy whole sheet for $40, or $1.20/sf and resell at somewhere around $5/sf. I do not know how to add the item and enter it correctly as there is no way to enter sf pricing but beyond that I have no idea even if I assigned a dollar amt for resale how to add an item that I buy "in bulk" or as a large sheet in this case, and break down and resell among several different jobs. Any help would be greatly appreciated. Thank you!