please help answer the problem in a step by step process

2. WonderFood is a multi-product company that makes three types of cereal. The company has fixed costs of $100, 000 per annum. Compute the following: (a) the separate contribution margin ratio for each product (b) the weighted-average contribution margin ratio of the company as a whole (c) the breakeven distribution of products. The following table shows the sales price, variable cost per unit and units sold of each product: Type 1 Type 2 Type 3 Variable Cost $5 $7.50 $9 per Unit Price per Unit $10 $13 $15 Unit Sold 2000 1500 1300