#VIN                    Dealer     Manufacturer Model   Year    Price
save	dars1a
del	4VHD2C649J2026214
add	JFDD2C649P1375699	Pooka GM	Ford	Excursion Excurating	1999	16303
del	4C42D8C19J3380902
add	WBH4D4CC9X4064299	Shelob MM	Volvo	240 Box Mobile	1986	18969
add	4LHD2C649M0089361	Hud's Son	Mazda	RX7 Rotary Drive	1980	23986
add	4PH2D8C19P2366860	Shelob MM	Toyota	Tundra Artic Expedition	1987	10646
del	16BWD4449P4153661
dump	VIN
years	1986	1
save	dars1b
load	dars1a
add	46H4D8C49L1106783	Hookie High Honda	Subaru	Impreza Unpress	2001	13175
del	SBC4D8C49P3088931
add	WVH4D4CC9U3303465	Hookie High Honda	Ford	Taurus Bull Bulba	1977	29502
del	SDB4D4CC9O0082343
add	4AB4D4CC9M3222054	Hud's Son	Mercedes Dialmer	C220	1987	18450
dump	VIN
#find input record
find	4AB4D4CC9M3222054
#update input record
update	4AB4D4CC9M3222054	18449
#find dealer average price
dealer	Hud's Son
dump	Price
save	dars1c
load	dars1b
dump	Dealer
histogram