1. The problem states that the expression $$62.4d - 210$$ gives the number of Indian rupees you receive when you exchange $$d$$ dollars. 2. We are asked to find how many Indian rupees you receive when you exchange $$13$$ dollars. 3. To solve this, substitute $$d = 13$$ into the expression: $$62.4 \times 13 - 210$$ 4. Calculate the multiplication first: $$62.4 \times 13 = 811.2$$ 5. Now subtract 210: $$811.2 - 210 = 601.2$$ 6. Therefore, when you exchange $$13$$ dollars, you receive $$601.2$$ Indian rupees.