49) Carlos Naturals manufactures bulk quantities of cleaning fluids. The company currently sells 700 containers a month at a sales price of $24 per unit. The addition of a new disinfectant will result in a sales price of $26 per unit for the improved product. It would cost a total of $4,000 per month to make the alteration. Operating income would [- A. increase by $2,600 r. B. increase by $4,000 ['1 C. decline by $16,800 [- D. decline by $2,600