boney corporation processes sugar beets that it purchases from farmers. sugar beets are processed in batches. a batch of sugar beets costs $53 to buy from farmers and $18 to crush in the company's plant. two intermediate products, beet fiber and beet juice, emerge from the crushing process. the beet fiber can be sold as is for $25 or processed further for $18 to make the end product industrial fiber that is sold for $39. the beet juice can be sold as is for $32 or processed further for $28 to make the end product refined sugar that is sold for $79. which of the intermediate products should be processed further?