(i) repay within 28 working days the whole or part of any grant paid which has not, at the date of termination been spent for approved purposes and
(i) ad-dalu cyn pen 28 diwrnod gwaith y cyfan neu ran o unrhyw grant a dalwyd nad yw ar ddyddiad terfynu’r cytundeb wedi cael ei wario at ddibenion cymeradwy