3. Gladys Night is starting her own business, producing fabric face masks in her home. She is planning to produce three different styles: an adult cotton mask, a child cotton mask, and a stretchy tube mask. Based on her personal experience purchasing masks in recent months, she has estimated her revenues and costs for 2021 as follows: Adult Child Revenue per mask 16.00 12.00 Tube 18.00 Variable costs per mask 9.60 8.40 9.90 Expected sales in units 1,000 1,200 400 In addition, Gladys has estimated her total fixed costs for the year as $8,800.