Estimating and Bidding 1 | Explore hands-on estimating and quantity take-off activities associated with general conditions, site work, concrete and formwork, and masonry estimating. CEUs issued. $551 includes $442 fee. Prerequisites: OCA-507 Introduction to Construction Estimating and OCA-509 Construction Blueprint Reading. Note: Online course. Offered in partnership with Construction Experts. Approved by the American Society of Professional Estimators.