___
___ 代 [substitute]
is in  ___
is in  ___
is in  ___
On-reading: ダイ as in 代金 daikin ___
DAI TAI ka(waru|eru) yo (1) substitute | replace (2) age | era 
代える kawaru to take the place of (intr.)
代える kaeru to replace (tr.)
代金 daikin price | fare | fee  
古代(の) kodai(no) ancient times   古 [old]
現代(の) gendai(no) modern times   現 [actual]