Add an option to the Production Summary report to show the number of "Cases" needed to produce the projected servings in Production

The production summary report can average/total recipe items by school, by item, consolidated, etc. A recent item brought up is being able to see, based on what has been projected in Production, the number of "cases" that would need to be ordered to fulfill the total projections for each recipe item (based on the linked inventory item).

We already show the "# Srv" on the Production screen under the "View Recipe" clipboard and having this on a report could be helpful for sites to be able to validate the total amount of what they're ordering for a day/week, etc. without having to try to do this manually when placing their orders in the Multi-Day Order Guide/Site Shopping List/Transfers screen in Inventory.