vehicle codes on purchase order???

i was finally able to execute a purchase order with vin number xxx202399.

now if the weather will cooperate, i will take deliery soon... on the purchase order, i understand most codes (all except 1). the price indicated agrees with what i expected, just trying to figure out the code

ee=50 state emmissions
bc=all my goodies
dk=???
cf=carpeted floor mats


any help with "dk"

thanks

sid
(ordered from beltway toyota in md-suburban dc)