THIS YEAR, THE START-OF-TERM FEAST HAD THREE DESSERTS

13. This year, the Start-of-Term feast had three desserts: chocolate eclairs, raspberry tarts, and jam doughnuts. On the dessert table, there were two doughnuts for every three eclairs, and six eclairs for every five tarts. How many tarts were on the dessert table if there were a total of 1320 desserts?