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[`Stock units of product quantities`]
- [`Products can be sold with various quantity units used; e.g., pieces or packages for single items, kilograms for weight products, square feet for flooring.`]
- [`For each product you can select the most suitable quantity units to conveniently present it in the storefront.`]
- [`The quantity unit shown in the storefront next the product price is the one to which the price refers.`]

[`Base quantity unit for convenient comparison of product prices`]
[`It might not always be convenient to compare the prices of products sold in packages if packages contain different product quantities. For instance, porcelain stoneware is sold in packages but it is convenient to compare the prices of different items by the price of a square foot rather than by the package price.`]
- [`To make the comparison more convenient, you can add one more quantity unit to a product—a base unit.`]
- [`To use a base unit, you need to specify its conversion ratio from a stock unit. That ratio is used to calculate the price of a base product unit.`]
- [`In the storefront, shoppers can see then two prices with their corresponding quantity units, and the conversion ratio specified for those units.`]
- [`Shoppers can select the most convenient of those units to compare and sort products in the storefront.`]

[`Adjustable add-to-cart step value`]
[`It is the minimum quantity of a product by which its quantity can be changed when the shopping cart contents are updated, i.e. when a product is added to the cart or when its quantity in the cart is decreased or increased.`]
[`Example #1`]
[`Suppose that you are selling porcelain stoneware in packages. For convenience, the price is displayed in the storefront in square feet but the product is available for purchase only in quantities expressed in whole packages. Therefore, you cannot always order an arbitrary number of square feet but you can purchase only an integer number of packages corresponding to a certain value expressed in square feet.`]
- [`To make the selling of such products convenient, you can set up an add-to-cart step value that should be used when a product is added to the shopping cart. It might be equal to the number of square feet of product contained in a package, for instance.`]
- [`A customer will be able to add only such a quantity of the product to the shopping cart which is multiple of that step value. If a package contains 12.5 sq. ft. then a customer will be able to add to the cart only quantities equal to 12.5 sq. ft., 25 sq. ft., 37.5 sq. ft., etc.`]
- [`If a customer attempts to manually enter a quantity which is not multiple of the specified step value then that quantity is rounded up to the nearest value multiple of the add-to-cart step.`]
[`Example #2`]
[`Suppose that you are selling watermelons measured accurate to the ounce.`]
- [`You can set up the add-to-cart step equal to 0.16 lb.`]
- [`A customer will be able to specify a desired product quantity with the precision of 2 decimal digits because you have set the add-to-cart step value with that number of decimal digits.`]
- [`When a purchased watermelon is actually weighed, the online store personnel can edit the placed order to save the exact weight value.`]

[`Minimum orderable product quantity`]
[`You can specify any product quantity below which a customer cannot add to the shopping cart. Different product types can have their own minimum quantities.`]

[`Configurable product quantity adjustment in the shopping cart with “+/-” buttons`]
[`You can change the standard value 1 to any other, more convenient, number by which the product quantity must be changed when the “+/-” buttons are clicked. This value does not affect the rounding of the product quantity.`]
[`Example`]
- [`Suppose that you are selling oranges, weighed in pounds, with the add-to-cart step of 0.16 lb.`]
- [`Shoppers and the store personnel can enter any values in quantity fields with the precision of 0.16 lb.`]
- [`However, to make it convenient for customers to change the product quantity in the shopping cart, you can set up the quantity alteration value, changed via “+/-” buttons, to 0.5 lb. so that it is not necessary to adjust the order weight to the ounce.`]

{sprintf_wp('The price of a base product quantity unit can be used for convenient price comparison. For instance, laminate flooring is sold in packages but it is more convenient to compare the prices of a square foot. In this example, a package is a stock quantity unit and a square foot is a base quantity unit. To start using a base unit, enable mode “%s” for the stock unit.', _w('Products can be available for order with different quantity units.'))}