Last week, Charles bought a t-shirt for $30, a backpack for $10, and a blue cap for $5. The store gave him a discount and, in total, he only spent $43. How much of a discount did they give him, in dollars?
The purchases he made totaled $30 + $10 + $5 = $<<30+10+5=45>>45
He should pay $45, but he only paid $43, so $45 - $43 = $<<45-43=2>>2 was the discount they gave him
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