Identify the offer, if any, in the following case study:

Harry sent Larry a text message stating: "Will you sell me your Video Game? Text back your lowest price". Larry replied: "Lowest price for my 'C' Video Game is $1,800." Harry texted : "We agree to buy your 'C' Video Game for $1800 as offered ."

iii) Susie sees a Tee-Shirt she wants to buy in the Surf Shop and notices the price tag of $2.00 on it. The sales representative tells her that the tag is wrong and the Tee-Shirt is really worth $20.00. Can Susie demand that she pays the $2.00 for the T-shirt?