Heedo Co. reported the following information for 2021 in millions: 

Inventory, beg. - 5.0; 

Purchases - 26.0; 

Freight in -2.0; 

Purchase returns and allowances - 3.5; 

Purchase discounts -1.5; 

Sales - 40.0; 

Sales returns - 3.0; 

Sales discounts - 1.0. 

A physical inventory taken on December 31 of the same year resulted in an ending inventory of 4M. Unsold goods out on consignment with the selling price of 1M are in the hands of a consignee. The gross profit was 40% on sales. At year-end, what is the estimated cost of inventory shortage?