Barmby's Aquarium Supplies Purchased Sets of Aquariums for $315

Barmby's Aquarium Supplies purchased sets of aquariums for $315.00 less 10%, 12%. Expenses are 21% of the regular selling price and the required profit is 42% of the regular selling price. The store decided to change the regular selling price so that it could offer a 20% discount without affecting its margin. During the Christmas season, the unsold sets were advertised at a discount of 40%. What operating profit or loss was realized on the sets sold during the Christmas season?

A) $112.83
B) $114.62
C) $112.11
D) $110.85
E) $123.49