Sports academy's T-Shirts has a selling price of $35 and unit variable cost of $20 for its printed cotton shirts. Fixed costs total $2,000. The academy believes increasing its price to $38 will not cause a reduction in the number of shirts it will sell. If academy's sales volume for the month is 400 shirts, how will net profit be affected by the change in selling price? a) $1,200 decrease. b) $2500 increase. c) $6000 increase. d) $2700 increase. e) $1,200 increase