Because the plan that WeDJ.com has negotiated is called a "Interchange Plus Plan" - giving a final percentage is impossible because visa and mastercard will charge different rates based on the type of card that was used.
As a reference, WeDJ.com was originally being charged 1.99%, but we moved our business to this plan because it would save us thousands of dollars yearly off of our processing costs.
On average, each transaction will be roughly between 1% and 1.75%.