Before leaving for the holiday you wish to backup your most important files onto CDs. These files have sizes 240, 462, 117, 560, 379, 110, 341, 294, 503, 469, 90, 63, 617, 493, 524, and 396 MB. If the...

Before leaving for the holiday you wish to backup your most important files onto CDs. These files have sizes 240, 462, 117, 560, 379, 110, 341, 294, 503, 469, 90, 63, 617, 493, 524, and 396 MB. If the capacity of a CD is 780 MB, formulate and solve a model to determine the minimum number of CDs needed to save all the files.