How is the par value of common stock revalued after an acquisition changes the par value of the outstanding shares, and the additional paid in capital in increased.

Question: Stock was traded at 20/share at time of exchange.

Par Value of shares outstanding before acquisition = $200000

Par Value of shares outstanding after acquisition = $250000

Additional Paid-in Capital before acquisition = $350000

Additional Paid-in Capital after acquisition = $550000

Based on the information was is the par value of the stock.

My text didn’t cover any specific equations so I am most likely missing a concept here but after reviewing the chapter that covers it I still have no idea what to do. I need to know how to do the math to get the correct answer.