Indigo 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, es. 15.25.) Determine the contribution margin per machine hour: (Round antwers to 2 decimal places es 15.25 ) If the limited resource can be increased by 640 hours, calculate the maximum increase in contribution margin. Assume that indigo cansell all products manufactured