2.Art is an international trader in rare Persian rugs . In June 2012 he received a delivery of an exceptional rug and wrote to his three most frequent clients , Bont , Con and Dun , saying that he was offering to sell the rug for 100.000. Bun immediately responded that he accepted the offer of the rug but was only willing to pay 75.000 Con also replied immediately , statirig that he accepted Art's offer but that he would not be able to pay the full amount before September 2012 . Dan replied that he would pay the offered price , but only if Art could supply an additional four rugs of equal quality . Before receiving any of these cephes , Art actually . sold the rag to EK a local client, for 105,000