If '$$+$$' means '$$-', '-$$' means '$$\div', '\div$$' means '$$\times$$' and '$$\times$$' means '$$+$$', then what will come in place of the (?) in the following equation?
$$15 \times 30 + 15 - 3 \div 2 = ?$$

A

15

B

30

C

35

D

40