Faraz R. answered • 11/14/16

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So profit = revenue - expenses.

We know his profit was 160.00. We do not know the revenue that this book case generated and this is what we are trying to find.

160=X-647-.15X.

this comes out to

160=-647+.85X

take the 647 over by adding it to both sides and you get 807. Then divide 807 by .85 to solve for X which is the cost. and you get 949.41.