Suppose Caterpillar, Inc, has 672 million shares outstanding with a share price of $72.85, and $24.43 billion in debt. if in three yoars, Caterpillar has 695 million shares outstanding trading for $82.85 per share, how much debt will Caterpilar have if if maintains a constant debt-equity rato? The amount of debt required in three years wil bes billion. (Round to two decimal places.)