Barrier call option prices are shown in the table below. Each option has the same underlying asset and the same strike price.

Calculate $X, the price of the up-and-in option.

(A) $20

(B) $25

(C) $30

(D) $35

(E) $40

Type of Option down-and-out up-and-out down-and-in up-and-in down rebate up rebate Price $25 $15 $30 $X $25 $20 Barrier 30,000 50,000 30,000 50,000 30,000 50,000