11. A telephone landline contract stipulates that calls between the hours of 6am–6pm during weekdays costs 7.5p (£0.075) per minute, with all calls outside these hours costing 1.5p (£0.015) per minute. If during a week, a customer makes 2 hours' worth of phone calls during the week between 6am-6pm and 30 minutes worth of calls at the weekend, what would their weekly phone bill be?