challenge-8.js

// After a hard quarter in the office you decide to get some rest on a vacation. So you will book a flight for you and your girlfriend and try to leave all the mess behind you.

// You will need a rental car in order for you to get around in your vacation. The manager of the car rental makes you some good offers.

// Every day you rent the car costs $40. If you rent the car for 7 or more days, you get $50 off your total. Alternatively, if you rent the car for 3 or more days, you get $20 off your total.

// Write a code that gives out the total amount for different days(d).

// #solution

function rentalCarCost(d) {
  return d >= 7 ? 40 * d - 50 : d >= 3 ? 40 * d - 20 : 40 * d;
}

rentalCarCost(4);