I have a solution that make in the region of £7 million profit.
I have lots of resources including a sample completed Excel workbook with comments and also exemplar questions for the probable activity 2 and 3.
I will email them to you. Please do not distribute the workbook to students as I am not sure this is giving them too uch help!
Send a paypal donation to discodancers@hotmail.com if you wish and I will use it for my school ICT fund.
Thanks
David