can someone please explain how the answer 1,710 is the correct answer? Becuase the explanation below is doesn't really explain it

The table above shows the gross requirements of a product. You are also given the following information: Holding cost = $4/ week; Ordering(Setup) cost =$85; Lead time =1 week; SS=0; Beginning on hand inventory =140. Calculate the total cost that includes the ordering cost and the holding cost when you use the L4L lot sizing rule? Only enter a number without any units. Round your answer to nearest whole number.) 1,710 (with margin: 5) Total ordering cost=unit ordering cost x number of order =856. Total holding cost=unit holding cost x total held inventory =4300 in this case. Therefore, the answer is sum of these two costs