Central Perk orders their organic coffee filters from a South American supplier that mails them as inexpensively (hence, as slowly) as possible. Central Perk uses 80 filters a day with a standard deviation of 5 filters per day. It would be disastrous if they ran out of these filters, years ago customers caught them using paper towels from the men's room and business suffered. They have set their service level at 99% in hopes of avoiding a similar situation. It takes a fortnight to receive a shipment and the standard deviation of the shipping time is two days. What is safety stock they need to carry to meet the 99% service level?

1495 filters are considered as safety stock.

Explanation:

d = 80 filters, std devd= 5, L = 14 days, std dev L= 2 days

Std dev dL = Sq rt ( Lσ d2 + d 2σ L2  ) = sq rt ( 350 + 25600) = 161 filter

z= 2.33 at 99% SL

safety stock = 2.33 X 161 = 375 filter

Reorder point = dL + Safety stock = 80 X 14 + 375 = 1495 filters

cognitive overload: having a lot on your mind impairs decision-making and tends to result in the simplest, but not necessarily best, option being selected.

empathy gaps: overlooking how you might feel in a different situation can result in unnecessary purchases, such as overbuying when shopping for food on an empty stomach.

optimism and overconfidence: wearing rose-tinted glasses and having unrealistic expectations about the future can affect money management and leave you unprepared for a change in circumstance.

instant gratification: seeking instant gratification drives impulsive spending and can undermine long-term planning and savings.

harmful habits: automatic or mindless behaviour can amplify a poor financial decision as it becomes a recurring event.

social norms: we are heavily influenced by the actions of others; while this can be in certain circumstances, it also contributes to the pressure to keep up with the joneses through conspicuous consumption.

if you use only 25 for your entertainment and only 200 for the groceries that you really need and take out the 50 per month for the computer then that should be enough