Breakfast Set A includes two pieces of toast, one egg and one cup of

Breakfast Set A includes two pieces of toast, one egg and one cup of coffee. Breakfast Set B includes one piece of toast and an egg. A customer bought both Set A and Set B and paid $8. The next customer bought only Set A and paid a round figure sum (he did not give or receive any change in cents). What is the cost of a piece of toast?

A. $2
B. $1
C. $1.5
D. $3
E. It cannot be determined from the information given