Help with two Excel formulae

Hi,

I really need someone just to help me out with a couple of formulae on Excel that I have just spent 2 hours trying to sort out!

I have attached the spreadsheet below - all I need is:

1) Is for column F to show the number of minutes between Columns E and G i.e.the time in minutes and hours that the task has taken.

2) For Column I to show the cost incurred for each task at £8 per hour i.e. if it took 15 minutes to complete it should show £2 in column I.

I need this done urgently, preferably today - please only respond if you can definitely complete this task and can do it today. I will pay immediately the task is complete.

Many thanks!