These appear only with the Custom Meal Builder module, under the section named after your builder title. Base Price is what the customer pays for one unit of this ingredient in the builder. 1 measure is the weight of one unit in the base unit (e.g. 150 means one piece = 150 of the selected unit; two pieces = 300). Min Custom Quantity and Max Custom Quantity limit how many units a customer may choose. The Show as ... toggles decide which builder slots (Protein, Carb, Veggie...) the ingredient is offered in. Quantity Pricing rows (Product Quantity + Price increase) add a price step after a given quantity: with 2 - $2, every unit after the second adds $2.