please help

The following data relates to Big-N-Clean, Inc. in questions 40-41: Big N-Clean, Inc. makes bulk cleaning fluid, and sells 1,000 1units per month at a price of $22 per unit. 40) If Big-N-Clean adds a new disinfectant, it could sell the improved cleaning fluid for $25 per unit, but it would cost the firm a total of $3.800 per month to make that alteration. What would be the effect on operating income? APIt would decline by $1,200 BIt would increase by $3,000 Cht would increase by $400 DHt would decline by 8800