How much does this cost to the nearest dollar?

SpiroPure NSF Certified Refrigerator Water Filter Replacement for 9002, NL200, (3 Pack)
CERTIFIED & SAFE Tested and certified to meet NSF/ANSI Standard 42 to reduce chlorine taste and odor and NSF/ANSI 372 for lead-free material. A BPA-Free, Food Grade product. 0.5 MICRON PREMIUM FILTRATION Premium coconut shell carbon provides a 0.5 micron rating for greater filtration of contaminants than competitor filters with 1 micron ratings QUALITY REPLACEMENT Guaranteed to fit in any Whirlpool or Kenmore refrigerator that currently uses 9002, NL200, 46 9002, WFI WF286, WFI NL200, WSW-4, WSW 4, EFF 6009A,

Price is $40.00

Price: $39.99