Trayne Corporation's Sales Office and Manufacturing Plant Are Located in State

Trayne Corporation's sales office and manufacturing plant are located in State X. Trayne also maintains a manufacturing plant and sales office in State W. For purposes of apportionment, State X defines payroll as all compensation paid to employees, including elective contributions to § 401(k) deferred compensation plans. Under the statutes of State W, neither compensation paid to officers nor contributions to § 401(k) plans are included in the payroll factor. Trayne incurred the following personnel costs. $\begin{array}{lrrr}&\text { State X } & \text { State W } & \text { Totals } \\\\\text { Wages and salaries for employees other }\\\text { than officers } & \$ 500,000 & \$ 300,000 & \$ 800,000 \\\text { Salaries for officers } & 300,000 & 150,000 & 450,000 \\\text { Contributions to } \S 401(\mathrm{k}) \text { plans } & 200,000 & 50,000 & 250,000\\\text { Totals } & \$ 1,000,000 & \$ 500,000 & \$ 1,500,000\\\text { Trayne's payroll factor for State } \mathrm{X} \text { is: }\end{array}$
a. 100.00%.
b. 66.67%.
c. 62.50%.
d. 50.00%.