The cost of a 355-ml can of juice is $1.25 in a vending machine. A 1.89-l carton of the same juice costs $3.89 at the grocery store. How much would you save per ml if you bought juice from the grocery store instead of the vending machine? (Hint: 1 L equals 1000 ml)

a) $0.002 per ml
b) $0.004 per ml
c) $0.006 per ml
d) $0.008 per ml