You are cautiously bullish on the common stock of the WildCorporation over the next several months. The current price of the stock is $$65$ per share. You want to establish a bullish money spread to help limit the cost of your option position. You find the following option quotes:

Wild Corporation Underlying Stock Price: $$65\mathrm{.}00$

Expiration Strike Call Put

June $ $60\mathrm{.}00$ $ $10\mathrm{.}00$ $ $3\mathrm{.}50$

June $ $65\mathrm{.}00$ $ $5\mathrm{.}25$ $ $4\mathrm{.}50$

June $ $70\mathrm{.}00$ $ $2\mathrm{.}75$ $ $9\mathrm{.}00$

a$.$ What will the cost to develop the bull money spread with calls be$?$

b$.$ What is the importance of the bull money spread?