Answer
423 dollars
Work Step by Step
males in service--$x$
males in sales--$y$
females in service--$b$
females in sales--$c$
$x = 120 + b$
$c = y - 289$
$x = 2b - 303$
$y = 2c - 227$
$120 + b = 2b-303$
$120+b-b+303=2b-303-b+303$
$423 = b$