Shopme E-Commerce Themes

Hi Sir/Mam,
I have purchase a theme Shopme e-Commerce (Woocommerce), this is the software (below link provided)

and I’m wondering how/where to setup the Commission earn from Seller, and also commission earn from Shipper. Or is there another plugin needed for this function ?
and also, usually how much (%) do you recommend to set.

Can someone please help me or guide me


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