In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data
leila $2 ====> $5 jo
jo = $30
x = leila = ?
Step 02:
$2 leila ---------- $5 jo
x ---------- $30 jo
x * 5 = 30 * 2
x = 60 / 5 = 12
The answer is:
Leila makes $12 profit.