16. Emang contracted to sell an automatic refrigerating machine to Lourdes. The machine was delivered as per description stated in the sales contract; and as mutually agreed, the vendor installed the machine. The machine however, did not give the results expected from it. Lourdes refused to pay the balance of the purchase price and the cost of the installation of the machine and filed an accion redhibitoria against Emang. In her counterclaim, Emang demanded recovery of the balance of the price and the cost of the installation. Decide with reasons.