Sylvia sold her only car to Ben for P200,000 payable in 10 equal monthly installments of P20,000 each. As security, Ben executed a chattel mortgage on the car and another chattel mortgage on his laptop. After paying the first two installments, Ben defaulted in the payment of third, fourth and fifth installments. As consequence, Sylvia foreclosed the chattel mortgage on the laptop which was sold for P90,000. May Sylvia recover the deficiency?