In WooCommerce Settings Panel, there will be a new submenu link called ‘WS Extra Fees‘ where you can:
* Enabled / Disabled the extra fee option row
* “Label” – choose the name for the extra fee
* “Amount” – set the amount to be charged for the order
* “Type” – there are 2 types (Fixed Rate or Cart % Fee)
* “Taxable” – the fee will be taxable or not
* “Minimum Order” – apply fee when cart total is less or equal than this amount
* “Cart Items” – you can set cart item range for the fee
* “Payment” – apply to certain payment gateway only
