In the revolutionary army, muskets, x, cost $6 and bullets, y, cost $2. The army only have $600 as a nation. what equation can we use to show how many muskets and bullets we can afford if we have to spend all of our money.

A) 600x+ 2y=6
B) 6x+2y=600
C) 6+2= xy
D) 2x+ 6y=600
Please help!​