Nature's Miracle Stain Remover (4-Pack)

New pack of 4 Nature's Miracle Dog/ cat urine stains remover. 3.8L/1 Gal each . Total 4 bottles ( never opened) still in box Amazon/ PetSmart price of each = $45 + taxes Asking: $15 for 1 or $50 for all 4 { Get 4 bottles at the price of 1}