



 
Hi Malik, I can get you started. Suppose that Luk pays $S for each tool he buys then Marc pays $(S  5) for each tool. Thus with a $100 investment Luc can buy 100/S tools and Marc can buy 100/(S  5) tools. Do you see what to do next? If you need more help write back, Malik wrote back
Malik, Luk buys 100/S tools and makes $1 profit on each tool so his profit is $1 × 100/S. Marc buys 100/(S  5) tools and on each tool he makes a profit of $2 so his profit is $2 × 100/(S  5). Marc's profit is $6 more than Luk's profit. Can you complete it now?  


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