Jason bought 100 shares of TTQ a year ago. The price has since risen by 9% to $11.99 per share. How much money did Jason originally invest?

if x was the original price per share, then

1.19x = 11.99
x = 10.07563
100 * 100 = $10,075.63
of course, some rounding may have occurred, so maybe it was just
100 * 10.08 = $10,080