Oriole's Donut Shop sells boxes of a dozen donuts for $9. has variable costs of $5 per box and has fixed costs of $4740 per month. Last month. Oriole's had an operating profit of $1580. Which of the following statements is correct?

a. If Oriole's has an increase in sales of 5.0%, it can expect operating profit of $1896.

b. if Oriole's has an increase in sales of 10%, it can expect operating profit of $1896.

c. If Oriole's sold 2396 boxes last month, its operating profit would have been $2396.

d. If Oriole's had sold 1896 boxes last month, it would have hit the break-even point.