Week of supply analysis

Starting inventory TY 3000 ea
· Starting Inventory LY 4000 ea
· No upcoming receipts planned TY
· No additional Inventory received LY
· Last 4 weeks sales TY 2000 ea
· Last 4 weeks sales LY 1000 ea
· Last 4 weeks sales Plan 1500 ea
· TY week 2 had promo and sold 1000 ea Vs 500 ea same week last year
· Upcoming 4 weeks sales LY 1500 ea
We need to carry 8 months of stock. How many inventories would be required based on above scenario?
TY, LY = This year, last year
ea = each
inventory is basically stock.