Answer:
Days on Inventory: 73
Step-by-step explanation:
First step, calculate the Inventory Turnover
 
 
Where: 
In this case we are given with only one inventory so we work with that.
Sales 10
Inventory 2
 
 
Inventory TO 5
The company sales their inventory 5 times per year 
Next, we calculate the days on inventory
 
 
Inventory TO 5
Year 365
 
 
Days on Inventory: 73