For those familiar with getting percentages when making your own chicken feed..... please help! My feed consists of: 50 lbs Whole Oats 25 lbs Spring Wheat 15 lbs Black Oil Sunflower Seeds 9 lbs Flaxseed I used a calculator to determine the protein percent and it gave me 28.85 total %. Is this right?! If so... what would be the CORRECT ratios (pounds of each for approx 100 total pounds) of these 4 ingredients for 16% protein? It has to be these four based on availability and price (in my area). THANK YOU!!!!!!!!