Final answer:
Calculating the time between buy and sell of stocks involves subtracting the purchase time from the sale time, while the average inventory flow time is the average duration it takes for inventory to sell after purchase.
Step-by-step explanation:
To calculate the time between buy and sell of stocks, you need to note the time at which you purchased the stocks and the time at which you sold them. You would then subtract the buy time from the sell time to find the duration held. For example, if stocks were bought at 10:00 AM and sold at 2:00 PM the same day, the time between buying and selling would be 4 hours.
To calculate the average inventory flow time, you need to measure the time it takes on average for inventory to be sold after being purchased. This typically involves assessing the time it takes for items to be sold and then averaging this over the number of items. For example, if over a period you notice that inventory tends to sell within 30 days on average, then the average inventory flow time is 30 days.