My company would like to setup subscription(s) with two products. One is an (evergreen?) tiered usage with normal proration. If the customer cancels, they only pay for the part of the month they were active. I think this should be straightforward to set up. The second is a 12-month termed flat fee amount that is paid in installments. For example, if the total for the year is $600, then each month they pay $50. However, if they cancel before the term is up, we want to charge them the remainder of the fee at cancellation. There should be no credits and no proration. Example, they have been customers for 7 months, and each month have paid $50, but now they want to cancel. How do I set this up to automatically charge them the remaining $250? Based on the 'Billing Rules' settings, it seems like proration is all-or-nothing, so I don't know if this is even possible.
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