Jos donut express earned 4,378 at a festival by selling chocolate or vanilla donuts for 2 dollars each if they sold 978 chocolate donuts how many vanilla donuts did they sell

Respuesta :

2422 because 978x2=1956
4378-1956=2422
978x2=1956
4378-1956=2422
2422/2=1211
They sold 1211 vanilla donuts.