From this we are given 2 equations (I assume you know how to solve a system of equations):

For sales person A: y = 360 + .06(x - 1000)

For sales person B: y = .08x

Now we need to find out where these equation are equal. Setting them equal (substituting y for y) we get:

360 + .06(x - 1000) = .08x

360 + .06x - 60 = .80x

300 + .06x = .80x

300 = .02x

x = 300/.02 = $15000 in sales for each.

y = .08x = .08(15000) = $1200 in compensation for each.