Given that a store purchased an item for $90.
They want a profit of 40% of their costs.
So, 40% of their costs = 40% of $90
= 40/100 * 90
= $36
Let y be the minimum selling price
So, from the question we c an say thst:
y = $(90 + 36)
y = $126
Therefore the minimum selling price of $126 would give the profit of 40% of their cost.