$10\mathrm{.}5.($LO $10\mathrm{.}6)$ Video The PM Computer Company makes build$-$to$-$order $($BTO$)$ computers at its distribution centre year round. The following table shows the average value $($in $ millions$)$ of component parts, work$-$in$-$process, and finished computers at the distribution centre for the past four years.

$\backslash$table$[[,$Year$],[,1,2,3,4],[$Component parts,$$20\mathrm{.}5,27\mathrm{.}8,30\mathrm{.}8,37\mathrm{.}3],[$Work$-$in$-$process,$4\mathrm{.}2,6\mathrm{.}7,7\mathrm{.}1,9\mathrm{.}5],[$Finished computers,$3\mathrm{.}6,7\mathrm{.}2,8\mathrm{.}6,10\mathrm{.}1],[$Cost of goods sold,$226\mathrm{.}0,345\mathrm{.}0,517\mathrm{.}0,680\mathrm{.}0]]10\mathrm{.}5.($LO $10\mathrm{.}6)$ Video The PM Computer Company makes

build$-$to$-$order $($BTO$)$ computers at its distribution centre year round.

The following table shows the average value $($in $ millions$)$ of compo$-$

nent parts, work$-$in$-$process, and finished computers at the distribu$-$

tion centre for the past four years.

a$.$ Determine the number of inventory turns and the days of

supply for each year.

b$.$ As the company has grown, does it appear that the company's

supply chain performance has improved? Explain your answer.

c$.$ If the company wants to improve its supply chain perfor$-$

mance, what items should it focus on$?$ Why?