Need help in an optimization problem for a manufacturing plant. I have a matrix of the ordered quantities by order and by sku and the stock quantities vector.

I want a model that allow us to assign the current stock to the orders and return the production plan in a way that minimizes the average amount of days that a unit is in stock. I can produce $100,000$ units per day of any sku. Some orders share the skus.

The result I want is an ordered list of the production per order per sku. I think that for this model you must assume that the remaining stock $($after first optimization model$)$ is received the first day. Then, each production day will output $100,000$ units $($pounds$)$ of any sku. I need Python coding also. You made general program. I Will adjust peddies matrix and stock vector my self.