First Americans, Inc A Determine the Amount of First Americans' Unrelated Business Income

First Americans, Inc., a § 501c)3) organization, operates a museum that depicts the lives of a tribe of Native Americans. It charges an admission fee but also finances its operations through endowment income, contributions, and gift shop sales. The gift shop is operated by 50 volunteers and the museum is operated by 15 employees. Revenue by source is: $\begin{array}{lr}\text { Admission fees } & \$ 700,000 \\\text { Endowment income } & 75,000 \\\text { Gift shop net income } & 300,000 \\\text { Contributions } & 100,000\end{array}$

a. Determine the amount of First Americans' unrelated business income UBI).
b. Determine the amount of First American's unrelated business income tax UBIT).