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a. Mage_Shipping_Model_Carrier

b. Mage_Shipping_Model_Carrier_Abstract

c. Mage_Shipping_Model_Shipping

d. Mage_Shipping_Model_Rate_Request

e. Mage_Shipping_Model_Carrier_Interface

a. array

b. integer

c. object

d. string

a. Carrier Code

b. Store Code

c. carrier title

d. method code

e. customer group code

f. website code

g. method title

a. Block/

b. Helper/

c. Model/

d. controllers/

e. etc/

a. Website

b. Store

c. Store View

d. Customer

e. Customer Group

f. Quantity