A parking garage has three zones: Blue (B), Red (R), and Yellow (Y), each with different hourly rates. The garage has the following rules: Parking in Red costs £2 more per hour than parking in Blue Parking in Yellow costs £1 more per hour than parking in Red If you park for exactly 2 hours, you get £3 off your total bill Today I parked twice: Morning: I parked in Blue zone for 2 hours and paid £9 Afternoon: I parked in Yellow zone for 3 hours and paid £27 How much would it cost to park in the Red zone for 2 hours?