share the steps, pls

Splish Productions Limited manufactures and sells three different products of different qualities. They are referred to as: Normal, High, and Superior. The accounting department provides the following information on these products: Determine the contribution margin per machine hour. (Round answers to 2 decimal places, e.g. 15.25.) Question Part Score If the limited resource can be increased by 400 hours, calculate the maximum increase in contribution margin. Assume that Splish can sell all products manufactured