Please help! And please explain how to get answers so I can learn how to do it on future problems. Thanks in advance! I'll be sure to give a thumbs up.

Whirly Corporation's most recent income statement is shown below. Sales (8,800 units) Variable expenses Total $ 272,800 167,200 Per Unit $31.00 19.00 $12.00 Contribution margin Fixed expenses 105,600 55,900 Net operating income $ 49,700 Required: Prepare a new contribution format income statement under each of the following conditions (consider each case independently): 1. The sales volume increases by 90 units. Whirly Corporation Contribution Income Statement Total Per Unit 2. The sales volume decreases by 90 units. Whirly Corporation Contribution Income Statement Total Per Unit 3. The sales volume is 7,800 units. Whirly Corporation Contribution Income Statement Total Per Unit