Are you growing in soil or soilless?
It matters for dosing, but either way you have way more than enough to make 14 gallons of nutrient mix. Lets say you are growing in coco, because it takes more nutrients on the schedule. The highest amount of anything on the schedule is 5ml per gallon. If you are only using 14 gallons total, then ballpark, you have a lot more than 14 gallons worth.
That's cool that you can call out how many gallons you are going to use in your whole grow like that.
As for the dosing %, the schedule is a recommendation. Plants differ so much. Are you running a spindly 3 leaf sativa or a mountain of an indica, or both? They would feed differently is my point. So the same dosage for both might burn one and underfeed the other.
Most people start at 50% of any nutrient as general rule of thumb as an insurance so they don't fry their plants. Then they start working their way up over time to see what the plant likes.
It's the weekend, so you can keep asking the question, but they probably aren't going to answer it any faster.