Welcome to MAC: It is the goal of every MAC employee to make customer service a leading priority. We understand that outstanding service is a foundation of good business. We will never take any business for granted and will continue to earn your trust every day. Our Services Include: Grain Merchandising Services. 1,175,000 bushels of storage capacity for Corn, Soybeans, Wheat, Oats, and Rye. Rye processor for seed; bagging and cleaning capabilities. Full line of animal/livestock feeds. Annual supporter of 4-H youth auctions at local county fairs.