Standard French builds 70 to 99 from sixty and eighty. 70 is soixante-dix (sixty-ten), 71 is soixante et onze, 72 to 79 are soixante-douze, soixante-treize, and so on. 80 is quatre-vingts (four-twenties), 81 is quatre-vingt-un, 90 is quatre-vingt-dix and 99 is quatre-vingt-dix-neuf. Quatre-vingts takes an -s only when no other number follows it.

100 is cent, 200 is deux cents, 201 is deux cent un (the -s goes when another number follows), and 1000 is mille, which never takes an -s: deux mille. In Belgium and Switzerland, people say septante (70) and nonante (90), and in parts of Switzerland huitante (80), which are simpler.

To ask a price, use Combien coûte... ? for one item and Combien coûtent... ? for several: Combien coûtent ces chaussures ? Or ask Ça fait combien ? You can also say C'est combien ? Answer with the verb coûter or just the amount: Ça coûte quatre-vingt-dix euros, or Quatre-vingt-dix euros.