We can break down this question in to two parts. Firstly we should work out how much Jodie earns for the hours that she worked. Since she worked 3 hours on Saturday to work out how much she was paid we have to multiply it by the hourly rate which is, £6.50. So, 3 x 6.50 = £19.50Secondly, we should work out how much she is paid in addition to this for the books she sells. To do this we have to work out 5% of £220. To work out 10%, we divide 220 by 10 which is £22. So, 5% is £22 divided by 2 which is £11. So to work out the total we do, £19.50 + £11 = £30.50