Could you send a clear image from frobt view
Suppose x books are produced by both methods.
Total cost for method 1 = 60346 + 10.5x
Total cost for method 2 = 18682 + 21x
Cost of method 1 = Cost of method 2
60346 + 10.5x = 18682 + 21x
60346 - 18682 = 21x - 10.5x
41664 = 10.5x
x = 41664/10.5
x = 3968
For 3968 books produced the cost by both methods will be the same.
In the box under the +4 put a +1, which means that column would equal 7. and then to the right of the +1 put a +6. on top of the +6 put a +3. then to the left of +3 put a 0. and the. on the bottom of the +1, right next to the +2, put a +6.