Charge vendors an additional flat amount or percentage fee on each transaction.

Woocommerce add-to-cart addon adds duration or increments to products. Opens in Settings > Unitizr

Configure advanced shipping options for your WooCommerce store with custom shipping methods. Be it weight based shipping or volume based shipping or quantity based shipping or any other conditional shipping. You can also add custom fees based on certain conditions. Show or hide shipping methods based on Product Categories or Product Tags.

Payment Fees for WooCommerce allows you to add custom fees for payment methods to your products.