Explanation : Assuming that the storage cost is paid at the end of the month, reverse cash and carry would produce the following cash flows at the end of a one month period: Sale proceeds of one barrel at spot price = $70. Plus one month interest earned at 6 percent on $70 = $0.35. Plus one month storage cost saved = $0.60. Thus the total cash flow at the end of one month from reverse cash and carry would be 70.00 + 0.35 + 0.60 = 70.95.