Great question, here is why; “allowing surplus inventories to grow out of control is costly in two respects. 1. Inventory storage costs on carrying surplus inventory from one-year to the next is $1.00 per pair (handling and storage of required inventory entails annual costs of $0.50 per pair). 2. There is a 1-star penalty applied to the S/Q rating of unsold branded pairs carried over to the following year—this penalty, which is part of the IFF’s S/Q rating formula, is to reflect the fact that unsold pairs are last-year’s models and styles, making them less attractive to buyers.” (Player’s Guide, 2018) Fix this by making sure you sell what you produce, and extending your delivery time may not affect you negatively and may benefit how much inventory you have to carry. People will wait for their favorite kicks, phone, games, gadget as long as it appeals to them.