How much does this cost to the nearest dollar?

Welham Green Pre-Filter 4-Pack Compatible with Pure Enrichment PureZone Air Purifier, Extends The Life of HEPA Filter
Most people know that clogged air filters are the primary cause of air purifier problems. Dust and debris in a filter restrict air flow, which causes your air purifier to become less effective and use more energy to compensate. Just like replacing your car engine’s oil and air filter every 5,000 miles, a clean filter protects your air purifier from becoming ineffective and, ultimately, failing entirely. But did you know that in many cases you don’t need to change the expensive HEPA filter every time the filter change indicator light turns on? It is often the case that just the pre-filter has become loaded up with larger particles. A clean

Price is $14.00

Price: $13.99