Handy Home sells window and doors in the ratio of 4:1 (windows: doors). The selling price of each window is $200 and of each door is $500. The variable cost of a window is $125 and of a door is $350. Fixed costs are $900,000. 1. Determine the contribution margin for one composite unit (1point) 2. Compute the break-even point in composite units (1 point) 3. Compute the number of units of each product that will be sold at the Break- even point. (2 point) 4. Compute the number of units of each product that need to be sold to achieve a net income of $180,000. (1 points)