Custom field fee values inside invoice

Hello.
How I can display custom fee values in invoice? I can display 'values' with [CUSTOM_FIELD_NAME], but not 'Fee values'.
For example, I have custom field with next options:
Name: paid_option_1
Values: Yes (+5$), No
Fee values: 5,0
And wanna display next inside invoice:
Name: [PAID_OPTION_1]
Price: 'fee values' (5 for example)
Is there is some way?
Thank you!

Hi Jasper

Unfortunately, it is not possible at the moment. I will try to add support for it in the future as there are other customers asking for it

However, it will take time to implement, and I think it will take me about 3 to 4 weeks to have it ready in the system (working on new version right now)

Tuan