For each of the following items, indicate whether a sequential, block, group, alphabetic, or mnemonic code would be most appropriate (you may list multiple methods; give an example and explain why each method is appropriate):

a. State codes

b. Check number

c. Chart of accounts

d. Inventory item number

e. Bin number (inventory warehouse location)

f. Sales order number

g. Vendor code

h. Invoice number

i. Customer number