Detailed Answer
The correct answer is (D).
100% – 22% = 78%$240,000 = $150,000
+ $90,000
$150,000 × 0.07 = $10,500
$90,000 × 0.03 = $2,700
$10,500 + $2,700 = $13,200
$240,000 × 0.78 = $187,200
$187,200 = $150,000 + $37,200
$37,200 × 0.03 = $1,116
$10,500 + $1,116 = $11,616
$13,200 – $11,616 = $1,584