Diane is concerned that natural gas prices might increase at a faster rate over the next 10 years. If the company projects that the average natural gas price of the next 10 years could be as high as $0.75 per therm, discuss how that might change your conclusion in (a). (Enter decrease in net income then enter with a negative sign preceding the number or parenthesis, e.g. -15,000 or (15,000).) Variable manufacturing costs New oven cost Proceeds from scrapping old oven Total Current Designs $ $ Retain Oven $ $ purchase the new rotomold oven. Replace Oven $ $ Net Income Increase (Decrease)