Benjamin had just obtained the keys to his new flat, and he wanted to engage a contractor who could help him with the carpentry works for his flat.

Benjamin called Roger, his friend and ex-classmate, and told him the following:

"Hey friend! I am looking for someone to do the carpentry works for my new flat. Can you do it, and how much will you charge?"

Roger replied:

"Sure! Anything for an old friend! Send me the floor plans and I will start working!"

As the phone line quality was poor, Benjamin only heard the phrase "send me the floor plans".

After the phone call ended, Benjamin sent Roger the floor plans via email. They also arranged via email to meet up at the flat two days later for Roger to view the flat and take measurements. On the day that they met up, Roger diligently took measurements, and listened to Benjamin's requirements about the carpentry works.

The next day after the viewing, Roger sent an email invoice with detailed terms to Benjamin. The email invoice provided a breakdown of the carpentry works, and also stated that the works will cost $20,000 in total. Initially, Benjamin only took a quick glance and emailed "OK" to Roger, which was immediately seen by Roger as he was working on his computer. A few hours later, Benjamin spent more time thinking about the details of the works and felt that they were overpriced. Benjamin then called Roger to ask why the price was so high. Roger explained that it was due to the cost of materials, but Benjamin was not convinced. Benjamin said that in that case, he has no choice but to find another contractor. Roger replied, "Don't we already have a contract between us?"

Explain whether there is a valid contract between Benjamin and Roger. In your answer,

you should identify and discuss the four (4) elements of a contract. (30 marks)

please help!! :(