c'est

1. it is (used to define the preceding word)
2. it is (used to introduce a focus)
3. this is

d'ailleurs

1. Used other than figuratively or idiomatically: see de, ailleurs.: from elsewhere
2. furthermore, moreover
3. by the way, by the by, about that

cela

• Pron

  that

• Verb

la

• Article

  the (definite article)

• Pron
• Noun

commission

commission (fee charged by an agent or broker for carrying out a transaction)

des

• Article

  1. plural of un (“some; the plural indefinite article”)
  2. plural of une (“some; the plural indefinite article”)
  3. plural of du (“some; the plural partitive article”)
  4. plural of de la (“some; the plural partitive article”)
  5. plural of de l’ (“some; the plural partitive article”)

• Contraction

affaires

1. plural of affaire
2. belongings
3. business

du

• Contraction

  Contraction of de + le (“of the”)

• Article