Charleville operates a continuous process producing three products and one by-product. output from the process for a month are as follows:

Product selling price per unit Units of output from process

1 $18 10,000

2 $25 20,000

3 $20 20,000

4(by-product) $2 3,500

Total joint costs were $277,000.

What was the unit cost valuation for product 3 using the sales revenue basis for allocating joint costs assuming that the revenue receivable from the by-product is deducted from the joint costs?