The following data was calculated from a company’s most recent financial period:

Static budget variance $980,000 U
Sales mix variance $161,500 F
Market share variance $100,000 U
Sales volume variance $105,000 F
Which one of the following statements about this company’s most recent financial period is true?

A. The market size variance is $43,500 F.
B. The flexible budget variance is $875,000 F.
C. The sales quantity variance is $266,500 U.
D. The sales quantity variance is $818,500 U.

Answer is A. I didn't understand solution. Could you please explain this problem.