Bates Company plans to add a new item to its line of consumer product offerings. Two possible products are under consideration. Each unit of Product A costs $6 to produce and has a contribution margin of $3, while each unit of Product B costs $12 and has a contribution margin of $4. What is the differential revenue for this decision?

a.$7 b.$1 c.$6 d.$9

Please I need this answer with explanation.

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