On Tuesday last week, Leo dropped off 10 pairs of trousers and some shirts at Sudsy Laundry. He was given a bill of $140, charged at $5 per shirt and $9 for each pair of trousers. When he went to pick up his clothes yesterday, the attendant insisted that he had only dropped off 2 shirts. Leo reported the matter to the manager, who ordered the attendant to search for the rest of Leo’s shirts. How many shirts were missing?
The cost of laundering all of Leo’s trousers is 10 * 9 = <<10*9=90>>90 dollars
Since the total bill was 140 dollars, this means that all the shirts were cleaned for 140 - 90 = <<140-90=50>>50 dollars.
As each shirt is cleaned at 5 dollars, Sudsy Laundry therefore laundered a total of 50/5 = <<50/5=10>>10 shirts
The missing shirts are therefore 10 - 2 = <<10-2=8>>8 shirts
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