Michael J. answered 06/12/15
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Mathematical Reasoning and Logic Application
The original cost is the cost before the taxes and charges are added. This means that the original cost is less than what Sam paid for. When all of this is added up, he gets a total charge of $60.
Let x = original cost of the gift
To get the sales tax, we multiply the rate by the original cost. Then we add the sales tax to the original cost. That is the cost after taxes. Then we add 8 extra dollars for the shipping.
We can write an equation that represents this.
x + 0.04x + 8 = 60
Solve for x.
1.04x + 8 = 60
1.04x = 52
x = 50
The original cost of the gift is $50.