tip; gratuity
小 (xiǎo) · 3 strokes
Depicts three small dots, representing the meaning "small". Originally the same character as 少. The small dots possibly represent grains of sand (沙).
费 (Fèi) · 9 strokes
Phonosemantic compound. 贝 represents the meaning and 弗 represents the sound. Simplified form of 費.