How much have I saved my making my own GBW?

I can't seem to post this right.

this is to all

My homemade green Black-Walnut extract is finished. I have saved a lot by taking the time to make my own. I paid $35.00 per 4oz. I made over 375 liters. The conversion is ummmmmmm.....

A) 375liter to milliliters= 375,000.ml.

B) 375,000.ml to oz is = 375000ml x 1oz/30ml,

or (375000.ml)(1oz)
-------------------= 12,500oz
30ml

C) 12500.00oz
------------- =3,125.
4oz

D) 3125 X $35.00= $10,940.

This seems so high. Is this right? What do you all think?