In provinces where there is PST (Provincial Sales Tax) as well and you have to charge both GST and PST, you calculate the GST on the price of the goods or service before PST has been applied. The provinces of Manitoba, Saskatchewan and British Columbia have PST: 1  in British Columbia, 7%.ST @ 15% $6.00. Total Price $45.99. For more on invoicing and applying taxes, see How to Invoice and An Invoice Sample with HST. Both of these articles explain exactly what information has to be on an invoice as well as providing invoice templates you can use.
NEXT STEP. Find out how much your project will cost. Provide a few details about your project and receive competitive quotes from local pros. The average national cost of building a foundation is $7,775, with most homeowners spending between $4,239 and $11,710.This data is based on actual project costs as reported by HomeAdvisor members. Any structure, whether a house, a garage, or workshop, is only as strong as its foundation.he average national cost of building a foundation is $7,775, with most homeowners spending between $4,239 and $11,710. This data is based on actual project costs as reported by HomeAdvisor members.
Steps. 1  1. Choose the type of foundation to build. The type of foundation depends on the area of the foundation will be located on and the type of structure that will be placed on it. 2  2. Set your footings 2 feet (60.96 cm) across. Add 2 feet (60.96 cm) on either side.