Answer:
Margo is incorrect.She is selling tea in loss.
Step-by-step explanation:
Let the cost price of teas when purchased from the warehouse = $ x
Then Margo marks retail price of teas a = x + 0.40 x
                    a = x (1 +0.40)
                    a = 1.4 x
After 2 months she marks down the retail price by 40% then retail price becomes b = 1.4 x - 40% of 1.4 x
        b = 1.4 x - 0.4 x 1.4 x
        b = 1.4 x - 0.56 x
        b = 0.84 x
Difference between cost price and selling price b is = x - .84 x
                                           = 0.16 x
which shows now Margo is selling under the cost price so Margo is incorrect.
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