Please explain how to calculate the ending inventory. Thank you.

[The following information applies to the questions displayed below.] Simon Company's year-end balance sheets follow. The company\’s income statements for the current year and one year ago follow. Assume that all sales are on credit: (4-a) Compute days' sales in inventory. (4-b) For each ratio, determine if it improved or worsened in the current year. Complete this question by entering your answers in the tabs below. Compute days' sales in inventory