Final answer:
Gunther originally paid $8.00 for the stock.
Step-by-step explanation:
To find out how much Gunther originally paid for the stock, we can set up an equation using the given information:
Return on investment = (Stock value - Original price + Dividend) / Original price
Plugging in the values, we get:
62.5% = (12 - Original price + 1) / Original price
Simplifying the equation, we have:
0.625 = (13 - Original price) / Original price
Multiplying both sides by Original price, we get:
0.625 * Original price = 13 - Original price
1.625 * Original price = 13
Original price = 13 / 1.625
Original price = $8.00
Therefore, Gunther originally paid $8.00 for the stock.