Bubble wants to acquire Gum to become Bubblegum. Bubble thinks that offer should be at least $X per share of Gum but not more than $42.$ The shares currently trade at $$30$ apiece. A hostile bidder has placed a bid of $$40\mathrm{.}00.$ Bubble estimates a $40\%$ chance that the hostile bidder will win, and a $60\%$ chance it will not. How much should be the value of X$?$