There are 10 reams, and each one weighs 32 ounces. Multiply 10 by 32 (simply move the 0 from 10 over to the 32, and you have your answer in Ounces)
10*32=320
Now, this is still OUNCES, we need to convert these to pounds.
32 ounces = 2 pounds, using the conversion chart.
