Answer:
21
Step-by-step explanation:
7+7+7=21
Picture it in your head
at -12 feet elevation (12 feet below ground level), the basement starts
62 feet from that level is the roof
so count 62 units up from -12 and get 50 feet above ground level (60-12=50)
answer is 50 feet above ground level
$20.95 - $17.50 = $3.45 simple math