Saskatchewan Design (SD) has a favourable sales quantity variance of $1,000 and an unfavourable market size variance of $2,500. Which one of the following is SD’s market share variance? A. $1,500 favourable B. $3,500 favourable C. $1,500 unfavourable D. $3,500 unfavourable.

Answer : B

Can you please explain how I can solve this problem.