# EOQ and ATM withdrawl

Ever tried applying MBA to your daily life? I tried to apply theory of Economic Order Quantity on the amount of cash I should withdraw and I am inclined to not follow its results.

1. D:  monthly consumption of cash = 15,000/- (to cover for maid salary, newspaper/milk/grocery bills, fuel/auto/transport costs, cafeteria & petty cash)
2. K: cost to order: 50/- to cover bank fees, fuel (to drive to ATM), cost of time (it takes me 15-20 to retrieve cash)
3. H: holding cost = foregone interest “4%/12”

When I tie all this together I get a value of Q = INR 21,213/-

However I have rarely seen anybody carrying that kind of cash around in their wallets. Most people tend to withdraw cash between 1-5k during the middle of the middle and 5-10k immediately after salary is credited. (but that is spend immediately to pay monthly bills)

Also a lot of ATMs limit the cash dispensed of 10,000/- forcing me to withdraw a sub-optimal amount. Is it because I have under-estimated the inventory holding cost (increased propensity to spend when you have cash in hand & risk of theft/mugging)

Please share other examples where popular wisdom over-rides the well researched theory.

## 3 thoughts on “EOQ and ATM withdrawl”

1. Anonymous

Check your calculation again

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2. calculations are correct. 4% is to be typed as 0.04 in the calculator

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