1. A factory which makes tyres has a capacity to provide 19,800 hours of machine use. The factory makes all type A tyres or all type B tyres or a mixture of the two types.

This was information available in one period.

Tyre type	A	B
Revenue and cost	Sh	Sh
Selling price	10	15
Variable Cost	8	12
Standard hours	3	4

Market conditions are such that no more than 4,000type A and 3,000 type B, can be sold per year. Annual fixed cost is Sh9,900.

Required: Compute the product mix to maximize the net income.