51. Sharon Inc. is headquartered in State X and owns 100 percent of Carol Corp., Josey Corp., and Janice Corp., which form a single unitary group. Assume sales operations are within the solicitation bounds of Public Law 86-272. Each of the corporations has operations in the following states:

Compute the following for State X assuming a tax rate of 15 percent.

a. Calculate the State X apportionment factor for Sharon Inc., Carol Corp., Josey Corp., and Janice Corp.

b. Calculate the business income apportioned to State X.

c. Calculate the taxable income for State X for each company.

d. Determine the tax liability for State X for the entire group.