Castle Rock's combined sales tax rate is 7.9%, which includes State (2.9%), County (1%) and Town (4%). The receipt also indicates taxes charged by other jurisdictions, which, in some cases, tax items at a different rate than the Town. For example, the Town taxes food for home consumption (gallon of milk, loaf of bread, etc.), but the State of Colorado and Douglas County do not. Therefore, for all food for home consumption, the only tax that should be applied is at the 4% rate. However, there are many things everyone taxes, such as laundry detergent, which would have a tax rate of 7.9%. The different rates are broken down by the grocery store's system, which charges the correct tax on each item, according to the jurisdiction's tax base. Therefore, it would be incorrect to add up all the percentages to 10.8%. Rather, the receipt shows a breakdown of various jurisdiction's taxes.