交通费

• 六(six; intersection)ASSOCIATIVE
• 乂(cross; intersect)PHONETIC

Two diagonal lines crossing like human legs stepping represent intersection and exchange.

• 辶(step; move)RADICAL
• 甬(passage; channel; path)PHONO-SEMANTIC

Following a clear pathway or passageway is the meaning of the character.

• 弗(not; no)PHONETIC
• 貝(shell; currency)RADICAL

Expense is money that you can never keep in your hand no matter how hard you try.