Runcibl'd Spooner: Another "I Lack Fives" Matter...?

Your final exam now is over.
(You need ne'er again bear such a grilling.) 
Pencils down!
     You owe Mr. Washington twenty.
D'you intend to him lend ev'ry shilling...?
Denzel's poun.'
     Moral:

Lay back! Pay back!