LeftShoe Corp. has 8 million shares outstanding, each trading at $25 per share. RightShoe Corp has 5 million shares outstanding, each trading at $40 per share. LeftShoe wants to acquire RightShoe. The acquisition will result in net synergies of $80 million as customers prefer bundled products. Assume that the pre-merger share prices reflect standalone values (that is, investors didnt anticipate acquisition). Suppose LeftShoe announces a stock offer to acquire RightShoe. What exchange ratio should it offer so that its shareholders get 20% of the synergies?