Under its executive stock option plan, Jackson Corporation granted options on January $1,2024,$ that permit executives to purchase $24$ million of the company's $$1$ par common shares within the next eight years, but not before December $31,2026($the vesting date$).$ The exercise price is the market price of the shares on the date of grant, $$20$ per share. The fair value of the options, estimated by an appropriate option pricing model, is $$6$ per option. No forfeitures are anticipated. The options are exercised on April $2,2027,$ when the market price is $$28$ per share. By what amount will Jackson's shareholder's equity be nereasee Wnen une ebuens are exercisee. $$ $$648$ million. $$ $$480$ million. O $$144$ million. $$ $$672$ million.