茶代 is read as ちゃだい (chadai) and means a tip.
ちゃだい
chadai
さどう
tea ceremony
ちゃわん
rice bowl
ちゃのま
(Japanese-style) living room
ちゃ
brown
ちゃいろ
ちゃかい
ちゃみせ
tea house
ちゃしつ
tearoom
ちゃや
(geisha) teahouse
ちだい
land rent
じだい
antique
せだい
generation