The following table shows Walmart$$s cost of goods sold $($COGS$)$ and average inventory value over the past few years.

$2016$

$2017$

$2018$

COGS

$361$

$361\mathrm{.}3$

$373\mathrm{.}4$

Average inventory value

$44\mathrm{.}5$

$43$

$43\mathrm{.}8$

The following table shows Walmart's industry average for inventory turnover and DSI during this period.

$2016$

$2017$

$2018$

Inventory turnover $($Industry average$)$

$7\mathrm{.}42$

$7\mathrm{.}43$

$7\mathrm{.}67$

DSI $($Industry average$)$

$55$

$56$

$55$