Bob and Joshua are best friends. They decide to run a flower shop together. They agree that Bob will be responsible for leasing suitable premises to run the business from, while Joshua will be responsible for buying the equipment that they need to run the flower shop. Both parties are very excited about the project. Joshua finds pots that he likes, and he believes those pots will be great for the business. He orders one hundred of them from Jane. Jane then sends the invoice and the pots to Bob, who takes delivery of the pots. However, before any other transaction takes place, Bob and Joshua have an argument and are no longer speaking to one another. Any plans for running the business together have now been completely dropped. Jane has not been paid for the pots she supplied. Advise Jane as to whether a partnership exists between Bob and Joshua. 

Why do  Jane wants to prove that there is a partnership between Bob and Joshua?