You have found a source which can supply you with popular movies on DVDs at £2.50 each (normal retail price £7.99 and upwards). As a student, and being inexperienced, you see an opportunity of making some extra spending money by buying these DVDs and then re-selling them to your own family, friends and colleagues and to their friends.

After some deliberation, you decide to purchase a supply of DVDs (at £2.50 each) and sell them at £4.50. Over the next two weeks the following purchases and sales take place:

Required 

Calculate the profit or loss you have made in week 1 and week 2.

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Week 1 Monday Tuesday Wednesday No. of DVDs bought 20 8 Thursday Friday Week 2 No. of DVDs sold Monday Tuesday 15 Wednesday 19 51 Thursday Friday 6239 10 14 69 4