First find the total amount Jack earned from the bottles: $0.10/bottle * 80 bottles = $<<0.10*80=8.00>>8.00
Then subtract that amount from his total earnings to find the amount he earned from cans: $15.00 - $8.00 = $<<15-8=7.00>>7.00
Then divide his total earnings from cans by his earnings per can to find the number of cans he recycled: $7.00 / $0.05/can = <<7/0.05=140>>140 cans
#### 140