Answer: The cost of 3 jackets= $69.75
Step-by-step explanation:
From the given table, we can see that
The cost of 2 jackets=$46.50
Thus, the cost of 1 jacket= 
To find the cost of 3 jackets, we need to multiply 3 to the the cost of 1 jacket, we get
The cost of 3 jackets= 
Hence, the cost of 3 jackets= $69.75