How much does this cost to the nearest dollar?

Philips 376491 - ALTO Straight T12 Fluorescent Tube Light Bulb
30 watt 36 T12 Medium Bi-Pin (G13) Base 6,500K Daylight ALTO Fluorescent Philips Light Bulb Color/Finish Daylight Color Temperature 6,500K Average Lifetime 18000 hours Lumens (light output) 1950 CRI 79 Brand PHILIPS, Light Type Fluorescent, Wattage 30.00, Bulb Base G13, Light Color Daylight White, Unit Count 1 Count, Color Temperature 6500 Kelvin, s 1, Brightness 1950 Lumen, Shape T12, Size 1 Count (Pack of 1), Connectivity Technology Normal bulb, Controller Type Push Button,

Price is $21.00

Price: $20.93