Tweety Company manufactures one model of birdbath, which is very popular. Tweety sells all units it produces each month. The relevant range is 0-1,500 units, and monthly production costs for the production of 1,000 units follow. Tweety's utilities and maintenance costs are mixed with the fixed components shown in parentheses. Suppose it sells each birdbath for $20. Calculate the unit contribution margin and contribution margin ratio for each birdbath sold. Prepare a contribution margin income statement assuming that Tweety produces and sells 1,400 units