If I use 3 drops, 5 days a week of A314? with a train coming in at 5 miles east, with another one coming west at 33.. at how many miles will they meet with a constant speed loss of 1 mile per hour.
ignore all that except that part about " If I use 3 drops, 5 days a week of A314?"
A regular size A314 bottle at a drop a day is said to last a year. So using that number as a guideline, you’re looking at somewhere slightly over the 4 month mark.
Use it less frequently than a drop a day and it could last you 2 years or more. Which is why buying alot of A314 at once isn’t always a good thing if you like product revisions. I forget which batch I have, but it’s undergone at least 3 or 4 revisions in the time I’ve had my bottle. Which will be two years come a few months for me.
Thanks for the reply Phya 
I am posting this directly from the Tech Specs found on the A314 product page.