I believe each sheet equals 1.76. Because if you add 1.50 and 1.02, you get 2.52. Then add 2.52 and 16.49, you'll get 19.01. After that you'll do 3.99 times 3 and get 11.97, subtract 19.01 from 11.97 to get 7.04. Finally do 7.04 divided by 4 to get 1.76.