Did you know the hidden costs of shopping on Black Friday can add up to one lost vacation day per year? According to Buy.com, the record temperature drops, aggressive crowds and transportation complications make shopping on Black Friday a hefty price to pay:

• Cold descends: Temperatures are expected to drop substantially nationwide, and shoppers are being advised to bring umbrellas in most cases. New Yorkers will experience a 24-degree drop from last year’s 61-degree weather to 37 degrees, and it’s expected to hit 20 degrees in Chicago. In L.A. winds are expected to reach nearly 29 mph.
   
• Mind the aggressive shoppers: Last year's holiday deals attracted 14 million more people from 2010, rising from 212 million to 226 million shoppers. Rising numbers and limited supplies led to some cases of violence including pepper spray attacks, trampling and mass hysteria in the early morning hours.
   
• Public transit stalls and parking woes: While the average price of gas is down nationwide, it’s still higher than it was in 2011. Meanwhile parking meters and city street cleaning complicate shopping for out-of-towners in areas like New York and L.A., who don’t know the laws and face pricey fines on top of an expensive shopping day. It may be economical to take public transit. But cities across the nation anticipate inconsistent timetables on Black Friday, and shoppers will endure long waits for overflowing buses, subways, trains and shuttles.