They had to pay $75 just to use the table, before they ever sold a basket.
How many baskets do they have to sell to earn that $75 back ?
Each basket costs them $12 to make, and they sell it for $20.
So every time they sell a basket, they earn (20 - 12) = $8 .
How many times do they have to earn $8 in order to earn back the $75 ?
1 basket . . . . . . 1 x $8 = $ 8 . . . . . not enough
2 baskets . . . . . 2 x $8 = $16 . . . . . not enough
3 baskets . . . . . 3 x $8 = $24 . . . . . not enough
4 baskets . . . . . 4 x $8 = $32 . . . . . not enough
5 baskets . . . . . 5 x $8 = $40 . . . . . not enough.
6 baskets . . . . . 6 x $8 = $48 . . . . . not enough
7 baskets . . . . . 7 x $8 = $56 . . . . . not enough
8 baskets . . . . . 8 x $8 = $64 . . . . . not enough
9 baskets . . . . . 9 x $8 = $72 . . . . . ooh so close, but not quite enough
10 baskets . . . . 10 x $8 = $80 . . . That's it !
Finally, they earned back the $75,
and they're $5 ahead of all of
their expenses.