Writing backend with raw SQL: $10 Writing backend with a rigid, verbose, mostly type-safe ORM: $5 Writing backend with a terse, expressive ORM: $2.50 Adding

Writing backend with raw SQL: $10 Writing backend with a rigid, verbose, mostly type-safe ORM: $5 Writing backend with a terse, expressive ORM: $2.50 Adding type annotations to the previous code: $1