Abbey Co$.$ sold merchandise to Gomez Co$.$ on account, $$11,100,$ terms $\frac{n}{45}.$ The cost of the goods sold was $$7,770.$ Abbey Co$.$ issued a credit memo to Gomez Co$.$ for $$2,100$ for merchandise returned that originally cost $$1,500.$ Gomez Co$.$ paid the invoice within the credit period. What amount of gross profit is earned by Abbey Co$.$ on these transactions? $