The purchase price for some add-ons may be different from what had been set initially for the Add-on. In some cases, the purchase price is zero due to receiving the Add-on from channels that only includes the sales price. You will need to edit the purchase price of the add-ons. In order to make this change easier without the need to edit the purchase price on the booking level, the option of editing the purchase price on the monthly profit report is available.
Please go to Performance -> profit, filter and find the profit you want and open it.
Click on Add-ons and click on the row of the add-on type to open it. Then, move your mouse under purchase column and click on the pen icon.
Now, edit the amount and click on the tick-mark to save the update.