Beau, Welcome the the forum, where all your BBQ questions can be answered. I don't use that brand lump, but I do use lump. How much coal is needed depends on how hot you cook. I don't really worry about it as I fill my coal ring pretty full for any cook. If you do the same you will have left over coal after the cook. I dump my left overs in a small metal trash can and use that coal to start my chimney the next cook. Best if you always have extra coal on hand, then no worries.
Happy smokin'
Mark