Caroline is a pickling enthusiast. She likes to stop at her local grocery stor

Caroline is a pickling enthusiast. She likes to stop at her local grocery store occasionally on the way home from work look for the latest seasonal vegetables
to pickle when she gets home.

She has been doing this for some time invested a lot in her celler as a result. Her shelves hold 60 jars and on average they seem to be about 2/3rds full
which would equate to 40 jars.

Caroline has a diehard belief that pickled vegetables reach an optimal flavor when they remain in the unopened jar for 6 to 8 months. She would like to adjust
her habits to adhere to that flavor interval. She currently estimates that she buys and pickles vegetables twice per month. How long on average does a jar
last before she opens it? (In months)