Gerald spends $100 a month on baseball supplies. His season is 4 months long. He wants to use the months he's not playing baseball to save up by raking, shoveling, and mowing lawns. He charges $10 for each. How many chores does he need to average a month to save up for his supplies?
He needs to save up $400 because 4 x 100 = <<4*100=400>>400
He has 8 months to earn this money because 12 - 4 = <<12-4=8>>8
He needs to earn $50 a month because 400 / 8 = <<400/8=50>>50
He needs to do 5 tasks a month because 50 / 10 = <<50/10=5>>5
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