8.8 The Licence Fee, Backline Support Fee and (where applicable) L1/L2 Support Fee shall be calculated by DSUK following the end of each calendar quarter and invoiced to DS TH in arrears.
8.9 R&D Fees shall be calculated at the end of each calendar month, or with such other frequency as the parties may agree, by the party performing the Outsourced Development and invoiced to the other party in arrears