Bullet price

So I just started watching Trigun stampede and Vash says that a bullet of .22 costs two slices of pizza. And yes I know this was just some filler comedy, but I did the math. So a round of .22 costs an average of .009¢(save this for later) and a medium pizza cost about $12, and consistent of 8 slices. So if we divide 12 by 8 we get $1.50 per slice making a round of .22 $3. And if we divide.09 by 3 we get 33.33 repeating, so that means that a .22 is worth %3333 more In Trigun compared to our world. Ok that's all