Answer:
She profited $9.78 for each of the 5 cases but she loss $48.3 in total.
Explanation:
The principal amount for each case is 9.72. (So 19.5 - 9.72 = 9.78. )
For the loss, the money she used to buy - the amount she sold = loss.
( 145.8 - 97.5 = $48.3)