please ans all parts of this question

Shurwock Productions timited manufactures and seils three different products of different pwalities. 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 declmal places, eg. 15.25.) If the linited resource can be increased by 670 hours, calculate the maximurn increase in contribution margin. Assume that 5hamrock can sell alf prodkicts manufactured