How much does this cost to the nearest dollar?

AQUATICLIFE Reverse Osmosis 10” Replacement Filter Cartridges Kit - Includes Carbon Block Filter, Sediment Cartridge, 50 GPD Membrane and Mixed-Bed Color Changing Deionization Resin for RO/RODI System
RO/RODI CARTRIDGES PACK – AquaticLife 10” reverse osmosis replacement cartridges pack includes (1) Carbon Block, (1) Sediment Cartridge, (1) 50 GPD TFC Membrane Filter, and (1) Color Changing Deionization Resin. SEDIMENT CARTRIDGE – The 5 Micron Sediment Filter Cartridge captures and reduces unwanted particulate material such as sand, silt, and rust from water which affects the taste and appearance of your water.

Price is $51.00
Price: $50.68