Question

TWO GENTLEMEN OF VERONA - A.J.Cronin
. Why did the two boys survive only on black bread and figs, despite making a decent earning? 

Answer 1

the money they earned was for their sister's hospital fees who was suffering from tuberculosis of the spine..

Answer 2

they were using the money for treatment of their sister. they don't want to waste money on eating things, they were not selfish that's why they survive like that.