How much does this cost to the nearest dollar?

KEEPOW Paultra Refrigerator Air Filter Replacement Compatible with Frigidaire PAULTRA Pure Air Ultra & Electrolux EAFCBF, (9 Pack)
Compatibility Paultra Refrigerator Air Filter for Frigidaire Paultra PureAir Ultra & Electrolux EAFCBF, SP-FRAIR High Quality EAFCBF Refrigerator Air Filter can Efficiently absorb odor and remove contaminants from your refrigerator, Keeping your foods fresher Activated Carbon Filter Frigidaire Air Filter is made of premium multi media, activated carbon air filter. Effective at keeping refrigerator fresh and odor free Easy to Install No tools required for installation, Simply tear serrated edge, pull window out, mark installation month and place in fridge Kindly Note It is recommended to replace every six months, or depend

Price is $20.00
Price: $19.99