Devon works 5 days each week. He delivers 840 cases of bottled water every day to his customers. He charges $0.88 for each case he delivers. Devon also spends $1,580 for gasoline every week. How much of the money collected does Devon have left at the end of the week?

First, we need to calculate how much Devon makes each day by delivering 840 cases of bottled water at $0.88 per case:

840 cases/day * $0.88/case = $739.20/day

Since Devon works 5 days per week, he makes in total:
$739.20/day * 5 days = $3,696

Next, we subtract the gasoline expense from his total earnings to find out how much money he has left at the end of the week:
$3,696 - $1,580 = $2,116

Therefore, Devon has $2,116 left at the end of the week after deducting all his expenses.