2018 Amount Percentage $4,920 $1,435 29.17% 2,200 1,180 53.64% 2,720 255 9.38% MacMan, Inc. reported the following data: 2019 Revenues $6,355 Cost of goods sold 3,380 Gross profit 2,975 Operating expenses: Sales and marketing expense 700 General and administrative expenses 480 Research and development expense 520 Other expense 410 Total operating expenses 2.110 630 70 11.11.00% 430 50 11.63% 480 720 2.260 40 (310) (150) 8.33% (43.06)% (6.64)% A. increased by 29.17% B. decreased by 53.64% O C. decreased by 29.17% OD. increased by 53.64%