a car salesman earns a base salary of $ 1000 per month plus a commission of $ 200 for each car he sells . if the car salesman earned $ 2000 in march , how many cars does he need to sell in april in order to double his march earnings ?
n0 = 1000.0
n1 = 200.0
n2 = 2000.0
t0 = n2 * 2.0
t1 = t0 - n0
answer = t1 / n1
print(answer)