where, when combined, provide turnover information and projections for the entirety of the period of 3 years beginning with the date any turnover was first generated during the relevant period.
pan nad oes trosiant wedi bod o gwbl yn ystod y cyfnod perthnasol, gan ddefnyddio rhagamcanion busnes credadwy am gyfnod o dair blynedd sy'n dechrau gyda dyddiad dyfarnu'r contract