Use the Information Below to Answer the Following Question(s)

Use the information below to answer the following question(s) .
At the high point of the relevant range, labour hours at Bradco Restoration were 10,000 and wages were $22,500. At the low point of the relevant range, labour hours were 7,500 and wages were $17,500.
-What is the high-low estimate of the labour costs at Bradco Restoration when 8,000 hours are used?

A) $21,500
B) $18,500
C) $17,750
D) $17,250
E) $17,125