CodingBat totalTicketPrice

totalTicketPrice

Amy has invited n of her friends for a movie. Each ticket costs $10. There is a promotion where for every 5 tickets bought, one person gets free admission. Define a function that when passed the number of friends invited, returns the total amount.

totalTicketPrice(5) → 50
totalTicketPrice(4) → 50
totalTicketPrice(18) → 160

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