Find a matrix A and a column matrix B that describe the following tables involving credits and tuition costs. Find the matrix product AB, and interpret the significance of the entries of this product.
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A.
AB = 
Tuition for Student 1 is $900, tuition for Student 2 is $780, and tuition for Student 3 is $630.
B.
AB = 
The number of credits for Student 1 is 12, the number of credits for Student 2 is 17, and the number of credits for Student 3 is 15.
C.
AB = 
The number of credits for Student 1 is 17, the number of credits for Student 2 is 15, and the number of credits for Student 3 is 12.
D.
AB =
Tuition for Student 1 is $800, tuition for Student 2 is $630, and tuition for Student 3 is $880.
Answer: A
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