Kendra owns a restaurant. She charges $3.00 for 2 eggs and one piece of toast, and $1.80 for one egg and one piece of toast. How much does Kendra charge for an egg? A piece of toast?
 a. $.60 per egg; $1.20 for toast
 b. $.60 per egg; $.60 for toast
 c. $1.20 per egg; $1.20 for toast
 d. $1.20 per egg; $.60 for toast