太平天国定都于何处()。

In a firm, if the net sales are 200 million dollars, the cost of goods sold is 50 million dollars, what is the gross profit?

A.250
B.150
C.300
D.350

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____________________ engaged in the sale of products using marketing methods which do not include a physical location.

A.Store
B.Non-store
C.Brick-and
D.Traditional

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