Answer:
A.
Explanation:
Given
Required
The valid UPC
First, the UPC is represented as:
UPC = ID followed by item number followed by the checksum
So, we have:
To calculate X (the checksum)
Add up digits at odd positions
Multiply by 3
Add up digits at even positions
Add the product and the sum of even
The last digit of the UPC is 9.
Hence, the UPC is: