For an order of 80 invitations in the 5x7 panel style you need just 8 sheets of paper and would spend $80 for the invitation panel if you tore the paper to size at home. Our paper sells for $10 per 18 x 24 sheet. Under each paper in our overstock section there is a number identifying the paper stack (1s, 2s, 3s, etc..) and a number indicating how many sheets are currently available in that particular stack.