Learn Spanish (Latin America): ¿Cuántos dólares cuesta la camisa azul? - How many dollars does the blue shirt cost?

Cuánto changes to match the gender and number of the noun it is asking about. Since dólares (dollars) is masculine and plural, we use the masculine plural form cuántos (how many). If we were asking about a feminine plural word like monedas (coins), we would use cuántas.

Where is the word for "does" in this question?

Spanish doesn't use helper verbs like "do" or "does" to form questions. The single verb cuesta covers both "costs" and "does cost".

Why does azul come after camisa?

In Spanish, descriptive words (adjectives) usually come after the noun they describe. Instead of saying "the blue shirt," you literally say "the shirt blue" (la camisa azul).

Since camisa is feminine, why isn't the word for blue "azula"?

Colors that end in a consonant, like azul (blue) or gris (gray), have the same form for both masculine and feminine nouns. You don't need to change the ending for gender, only for number (like camisas azules if there were multiple shirts).