Spotless Naturals manufactures bulk quantities of cleaning fluids. It currently sells 1,000 containers a month at a sales price of $20.00 per unit. If a new fragrance is added, $24.00 per unit could be charged for the improved product. It would cost a total of $800 per month to make that alteration. Operating income would A. decline by $800 O B. increase by $3,200 O C. decline by $4,000 O D. increase by $4,000