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The ratio of the number of cars to the number of motorcycles to the number of scooters in a parking lot is 2 : 9 : 7.

The total number of vehicles is 1260.

(a) How many motocycles are parked in the parking lot?

(b) The parking fee for a 2-wheeler for a 4-hour time period is $1 and that for a 4-wheeler for a 2-hour time period is $1.

How much money can be collected from the above vehicles if all of them are parked for 8 hours?

Notes to students:

If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12