Payment Allocation

Hi All, 

Need some help with Salesforce Billing. 

Customer wants payment allocation and credit control done within Salesforce. Trouble is they have CC fees, FX charges, currency fluctuations etc. They are not using a payment Gateway. 

They want to see this clearly in Salesforce split up as a bank charge/CC fee/Currency fluctuation etc. 

Has anyone come across this and how was this handled?

Thanks

#Trailhead Challenges