Three items are C, D, and E. Lead Time for item C=2, item D=1 & item E=1. So gross requirements for item C in week 1 and 2 is 100 each, zero scheduled receipts, zero planned receipts, and with 80 planned order releases, and 220 projected on-hand inventory. So week 1 projected inventory is {220+0+0-80)=120 and week 2 is (120+0+0-100)=20. Gross requirements for item D in weeks 1 and 2 are 180 and 200 respectively, 80 scheduled receipts in week 2, zero planned receipts with zero planned order releases, and 400 projected on-hand inventory. So week 1 projected inventory is {400+0+0-180)=220 and week 2 is (220+(-80)+0-200)=100. Gross requirements for item E in week 1 and 2 is 180 and 200 respectively, week 1 zero and week 2, 200 scheduled receipts in week 1, zero planned receipts and 85 for week 2, in week 1, 85 planned order releases and week 2, 200 and 95 projected on-hand inventory. So week 1 projected inventory is {95+0+0-180)=-85 and week 2 is (-85+(-200)+85-200)=0. Question: What specific actions are required and difficulties encountered in inventory records in Week 1?