Question $3$

$1$ pts

Monoprice offers quantity discounts on HDMI cables for televisions. The price for the first $30$ HDMI cables is $$40\mathrm{.}00$ per cable. After the first $30,$ all additional cables purchased are offered at a discounted price of $$10$ each. Suppose that Tua's inverse demand curve for HDMI cables is given by $P=60-$ Q$.$ How many HDMI cables will Tua purchase?