The Partners of Apple, Bere, and Carroll LLP Share Net

The partners of Apple, Bere, and Carroll LLP share net income and losses in a 5:3:2 ratio, respectively. The capital account balances on January 1, 2013, were as follows: $$\begin{array} { | l | r | } \hline \text { Apple, capital } & \$ 25,000 \\\hline \text { Bere, capital } & 75,000 \\\hline \text { Carroll, capital } & 50,000 \\\hline \text { Total partners' capital } & \$ 150,000 \\\hline\end{array}$$ The carrying amounts of the assets and liabilities of the partnership are the same as their current fair values. Dorr will be admitted to the partnership with a 20% capital interest and a 20% share of net income and losses in exchange for a cash investment. The amount of cash that Dorr should invest in the partnership is:

A) $25,000.
B) $30,000.
C) $37,500.
D) $75,000.
E) $90,000.