Kimmy earns a $200 commission on all sales plus a base salary of $30,000. Her total income last year was $80,00. Which equation can be used to calculate the number of Kimmy's sales?
A 30,00 + 200x = 80,000
B 30,00 - 200x = 80,000
C 200 + 30,000x =80,000
D 80,000 + 200x = 30,000