Adjust Trial Period Amount to Quantity - Recurring Profiles
(I had originally posted this question in the Admin section but I believe it's more of a programming issue.)
I have a recurring profile set up for a product with a 2-weeks trial period configured as follows:
Trial Billing Period Unit = 2 weeks
Trial Billing Frequency = 1
Maximum Trial Billing Cycles = 1
Trial Billing Amount = 9$
The product in itself costs 18$.
So what I want is that the Trial Billing Amount always amounts to 50% of the product price. Eg: if you order 2 of that product, your Trial Billing Amount should be 18$ (out of a total price of 36$); if you order 4 of that product, your Trial Billing Amount should be 36$, etc.
And yet, it appears that Magento does not adjust the TBA according to the ordered quantity. So regardless of the number of products my customers order, their TBA is always 9$.
>> Would anybody happen to know how to make the TBA dependent on product quantity?
PD: I've tried to enter the TBA as a percentage (you never know...) but of course it did not work.