The report adds that Sesko, 21, and Gyokeres, 26, would cost either £75 million ($99.7m) or under due to various clauses and agreements. Isak, on the other hand, is likely to cost well above £100m ($133m). Arsenal have been crying out for a new number nine in recent seasons and if they want to take the next step and end their trophy drought, a clinical striker is a must.