Answer
$750$ units
Work Step by Step
Given,
$C(x) = 12x+15000$
$R(x) = 32x$
To find break-even point,
$C(x) = R(x) $
$ 12x+15000 =32x$
$ 15000 =32x-12x$
$ 15000 =20x$
$x = \frac{15000}{20}$
$x = 750$
$750$ units must be sold to break-even.