To apply a discount select the invoice option and in the Invoice pop up select the price you wish to discount.
You can change it by $ or by %.
Select Apply discount button and this will change the amounts in the Invoice pop up.
You can also complete a discount or make edits for the line item in an invoice.
To Edit the quantity by using the + and - under Quantity.
To add a discount using either the price or % discount options. Enter in the amount
To add a surcharge check the surcharge box.
To credit the work to someone other than what is listed select the blue name.
Select Update and the invoice will be updated with the new amount. You can now enter the payment details for your sale by selecting the Take payment button.
Enter payment types as required and select the Complete payment button.