Please help me with this problem with an explanation.

Develop a lotfor-lot solution and calculate total relevant costs for the gross requirements in the following table'. a Period 123456789101112 Gross requirements 20 40 40 70 30 20 70 50 \"Holding cost = $1 .50lunillweek; setup cost = $150; lead time =1 week; beginning inventory =40. Develop a lotfor-lot solution (enter your responses as whole numbers), Period 1 2 3 4 5 6 7 B 9 1O 11 12 Gross requirements 20 4O 4O 70 30 20 70 50 Onhand at beginning of period 40 D Onhand at end of period Order reoeipt Order release