@clarkmorefarm, I'm glad you got the mineral. You still need a soil test on your farm and you need to talk to extension. The Co-op is better than your neighbor, but extension is unbiased and doesn't have an agenda.
Let me say something about LOCATION of the mineral in your pasture. You want to locate it well away from any shade and well away from your water source(s). Placing the mineral near either of these will result in luxury consumption. You will spend A LOT more than what you need to on the mineral and your cattle will be consuming much more than they require. Additionally, when these 3 components (mineral, water and shade) are all located in the same spot, a couple not-so-great things happen. First, your pasture does not get even utilization. It gets over used at the "resource" point and under used away from it. Additionally, because the livestock hang out at the resource point, all of the nutrients in the pasture get concentrated here from all the manure and urine. Keep the resources spread out which encourages even grazing throughout the pasture as well as even distribution of nutrients.