Anthony sells cars. Each month, he is paid $2,000, plus a 15% commission on monthly sales above $20,000. Which function calculates his monthly earnings (E) as a function of m, his monthly sales?
A) E(m) = 2,000 + 0.15(m 20,000)
B) E(m) = 2,000 + 0.15(m + 20,000)
C) E(m) = 2,000 + 15(m - 20,000)
D) E(m) = 2,000 + 15(m+ 20,000)