19. (5 points)
Diagon Alley's magic pharmacy has received a batch of Mandrakes, priced at a $100 \%$ profit margin. However, only $30 \%$ of the Mandrakes were sold. To sell the remaining Mandrakes as soon as possible, the magic pharmacy decided to offer a 60% discount, and the remaining Mandrakes were sold out. The profit margin for this batch of Mandrakes is $\qquad$ $\%$.
$44$