Leila wrote an equation to represent the revenue of a parking lot for one day. She let x represent the number of cars that paid to park and y represent the number of trucks that paid to park. If a car costs $8 per day, a truck costs $10 per day, and the total revenue for the day was $830, which equation could Leila use to represent the number of cars and trucks that paid to park that day?
A) 8 x + 10 y = 1,660
B) 10 x + 8 y = 1,660
C) 8 x + 10 y = 830
D) 10 x + 8 y = 830