Answer :
I don't know what your question is exactly. Are you asking how much total money he'll spend on the camera (inc. tax)?
If so, then you need to multiply 127.99 by 6%.
127.99 camera
7.68 tax
135.67 total cost
If so, then you need to multiply 127.99 by 6%.
127.99 camera
7.68 tax
135.67 total cost