In $2020,$ Caterpillar Incorporated had about $540$ million shares outstanding. Their book value was $$41\mathrm{.}4$ per share, and the market price was $$105\mathrm{.}70$ per share. The company$$s balance sheet shows that the company had $$29\mathrm{.}10$ billion of long$-$term debt, which was currently selling near par value.

What was Caterpillar$$s book debt$-$to$-$value ratio?

Note: Do not round intermediate calculations. Enter your answer as a decimal rounded to $2$ decimal places.

What was its market debt$-$to$-$value ratio?

Note: Do not round intermediate calculations. Enter your answer as a decimal rounded to $2$ decimal places.

Which measure should you use to calculate the company$$s cost of capital?