During the year, the cash sale was ISK 400,000. and the loan sale ISK 1,150,000. During the year, the balance of trade receivables increased by ISK 30,000. What was collected during the year, i.e. what is the total amount of money collected from customers during the year? Select one alternative: a-780,000 kr. I b-1,550,000 kr. c-1,520,000 kr. d-1,120,000 kr