Answer:
12 portrait sheets with total cost of $447
Step-by-step explanation:
x sheets ordered
Cameron: 33x + 51 = Lasting Memory : 29x + 99
33x + 51 = 29x + 99
33x - 29x = 99 -51
4x = 48
x = 12 sheets ordered
Total cost: 33 * 12 + 51 = 447
check: 29 * 12 + 99 = 447