Currency in Tarab is denoted by the following notation:
A Story is equal to a Copper Piece
A Poem is equal to a Silver Piece, or ten Stories
A Ballad is equal to a Gold Piece, or ten Poems
An Epic is equal to a Platinum Piece, or ten Ballads
The standard value for these coins (and their musical names) are derived from what tradition has deemed an appropriate payment for a bard to perform their namesake.