The required cost price of the tool is $150.
A discount of 10% on the tool is 15$. The original price is to be determined.
Cost price is the price for the buyer pays to the seller for an object or product.
Let the cost price is x
10% of x = 15
x*10/100 = 15
x/10 = 15
x =15*10
x = 150
Thus, the required cost price of the tool is $150.
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