How should we operate when managing the shelf life of food and other items by item?

In the case of food products, each item has its own shelf life, and it is necessary to sell the items with the earliest shelf life first.

In addition, items with earlier expiration dates may be sold at a discount.

We know that we can manage shelf life by lot number items, but we cannot set the unit selling price for each lot number, so we are unable to operate the system.

Is there a better way to handle food products with a shelf life?