A lady friend of mine gets French lessons for
eighteenpence an hour from a real French gentleman.
Well, you wouldn't have the nerve to ask me the same
for teaching me my own language as you would for
French; so I won't give more than a shilling.
These lines help the audience understand that Liza is -
A familiar with tutoring and education services
B good with money and estimating the value for services
C wary and suspicious that Higgins will try to cheat her
D clever in her own way and practical