A portfolio manager entered a swap with a dealer. The swap's notional principal is $100, payments are to be made semi-annually, and the swap allows netting of payments. The dealer agrees to pay a fixed annual rate of 4%, while the asset manager agrees to pay the return on SP500 index. The SP500 index at the initiation is 200. If SP500 six months later becomes 135, how much would be the payment from the dealer to the asset manager should be? Note: You should use a positive number to represents the amount the dealer pays to the dealer. You should use a negative number represents the amount that the dealer receives from the manager.