You are moving to a new apartment and need to hire a moving company. You’ve researched local moving companies and found these price options. Company Flat Fee Hourly Rate
Company A $50 $25
Company B $40 $30
Company C $60 $20
Company D $150 $5

If you anticipate that it will take about 4 hours to move everything, what is the approximate percentage difference of the best and worst deals according to their unit costs?

A.
16%
B.
18%
C.
19%
D.
21%