38. Rockville Enterprises manufactures woodworking equipment and is incorporated and based in Evansville, Indiana. All of its real property is in Indiana. Rockville employs a large sales force that travels throughout the United States. Determine whether each of the following is a protected activity in nondomiciliary states under Public Law 86-272:

a. Rockville advertises in Wisconsin using television, radio, and newspapers.

b. Rockville’s employees in Illinois check the credit of potential customers.

c. Rockville maintains a booth at an industry trade show in Arizona for 10 days.

d. Sales representatives check the inventory of a Tennessee customer to make sure it has enough stock and that the stock is properly displayed.

e. Rockville holds a management seminar executive retreat for corporate executives over four days in Florida.

f. Sales representatives supervise the repossession of inventory from a customer in Maine that is not making payments on time.

g. Rockville provides automobiles to Idaho and Montana sales representatives.

h. An Alabama sales representative accepts a customer deposit on a large order.
i. Colorado sales reps carry display racks and promotional materials that they place in customers’ retail stores without charge.