The cost of the oil per barrel is $98.43 at the bed of the week.
Explanation:
Cost per barrel = $102
Reduction in the coat per barrel = 3.5%
= (3.5/100) (102)
= 3.57
Cost of the oil per barrel at the end of the week = 102 - 3.57
= $98.43
The cost of the oil per barrel is $98.43 at the bed of the week.