Able, an agent, was engaged by Charlie to purchase a parcel of land on his behalf. In the agency-principal agreement, Charlie agreed to pay him a commission if and when the purchase of land was complete. Able approached Sid, the owner of the land Charlie was interested in, and offered to sell the land for him as his agent if he would pay a commission on the sale. Sid agreed, and Charlie set up the sale between Sid and Charlie. Without disclosing details of the transaction to Charlie, Able collected a commission on the sale from both Charlie and the landowner.What is the main legal issue? What remedy, if any, does the principal have? (5 marks)