LIQUIDATED AND UNLIQUIDATED DEBTS

Peter and Charles entered into a written contract pursuant to which Peter was to render decorating services for Charles for a total price of $75,000.After the service had been performed, a good faith dispute arose between Peter and Charles over whether all of the services had been properly performed.Peter claimed that the full amount was due, but Charles argued that only $50,000 worth of services had been performed.After several weeks of argument, Charles sent a check for $60,000 to Peter on which Charles had written "payment in full for decorating services".

1. Peter endorsed the check, without making any further notations on it, deposited it, and sued Charles for the remaining $15,000 she claims is due.Judgment for whom?Explain.