Answer
a. 1500 W.
b. 12 A.
Work Step by Step
a. The power delivered to the interior, 950W, is 65 percent of the power drawn from the source.
$$P_{in}=950W=0.65P_{source}$$
$$ P_{source}=\frac{950W}{0.65}\approx 1500W$$
b. Calculate the current drawn from the source by relating it to the source power and the voltage.
$$ P_{source}=IV_{source}$$
$$ I=\frac{ P_{source}}{V_{source}}=\frac{1462W}{120V}\approx 12A$$