StoreHippo allows you to define the formula in the seller ledger. The commission on the seller will be applied on the basis of the defined formula. In case, if you want to apply multiple charges on the seller, you can achieve so by defining the formula in the seller ledger rule.
You want to charge the seller a flat fee per transaction as well as a percentage of the product total. Suppose the product was sold for Rs 1000.00, then you want to charge 25% (Rs 250) as the commission fee and the additional fee of Rs 50 as a transaction fee. So, for the purchase of Rs 1000, the seller will be charged Rs 300.
Now, when the customer purchases the product from the specified seller, the ledger will be created as per the formula.