The Card Shop buys and sells cards. They buy cards for $25 and sell them for $35, on average. The Shop pays its employees 10% commission on each sale. The shop's rent is $1,200 per month, and salaries are $1,500 a month. If the shop sold 4,000 cards last year, what was its contribution margin?

Group of answer choices

$8,000

$26,000

$22,000

$40,000