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Jack and Jill are competing retailers who pay the same wholesale price for a widget. Jack sells the widget for $5.00 and Jill sells the widget for $5.90. Jill's profit on her sale of each widget is ten times Jack's profit. What is the wholesale price of the widget?

$4.90

At $4.90:-

Jack's profit = $0.10 ($5.00 - $4.90)

Jill's profit = $1.00 ($5.90 - $4.90)

So Jill's profit is 10 tmes greater than Jack's.