Question

option 1: 2-by-3, 3-by-4, and 4-by-5
option 2: 2-by-2 , 3-by-3 ,and 4-by-4
option 3: 3-by-5 , 3-by-6 , and 3-by-7

For each pyramid option, calculate the total number of shoeboxes used after each row has been completed. That is calculate the total number of shoeboxes in the top row, the total number of shoeboxes in the top three rows, and so on.

Please help me i'm very confused!
`Please and Thanks!