The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From SDSU AgBio Communications:
Feed Cost Calculator allows livestock producers to compare two available feedstuffs based on their relative cost per pound of protein and energy delivered. The app provides book values for several feedstuffs. Edit these or add new feedstuffs as needed, providing as many values as are available. Feed Cost Calculator will return the delivered cost per pound of each feed and the break-even cost for the second feed as compared to the first.Feed Cost Calculator aims only to provide the better buy. It is not intended to provide feed rations or any other information.