This module adds a widget and display formatter to the basic "integer" field to edit and display it as a decimal field. It is generally considered a best practice to store ecommerce prices as integers in the lowest denomination such as cents. This avoids a whole class of rounding and other calculation errors.

There are other modules for Drupal that support "price" fields, but they all have a limitation that makes them unsuitable for many use cases:

Formatted Number only supports formatting on it's custom field type, and isn't built on the integer field. To do decimal formatting you have to use the decimal field type, which uses MySQL's decimal() type in the database.
Money also stores it's data in MySQL as a decimal() field.
Commerce price stores data as a serialized blob within it's field, which prevents any custom MySQL queries on the data.
Currency field is explicitly for currency data (USD, CAD, etc) and not prices. It might be useful in combination with this module.

Integer Field Formatter addresses all of these concerns by using a basic integer field for storage, while modifying the display and editing functionality in the front end.

Installation

This module requires:

Libraries
The autoNumeric jQuery plugin, version 1.x. Download and extract the library to sites/all/libraries/autoNumeric.

Enable the Integer Format module, and then configure settings on integer fields to add the formatter.

RTBC issues for Integer Format

Filters