The box is 15 inches wide, so only 3 books can fit side by side. Since the box is 1 foot deep and each program is 1/8 of an inch then 1/8 of a inch is .125 inches then you would divide 1 foot( 12 inches ) by 1/8 (.125 inches) This gives you 96 programs in one row. Since there are 3 rows then we would multiply 96 by 3 which gives 288 programs.