Need Urgent Help! School Project...can't Figure Out Calculated Field

Most of the project is done...I am stumped on calculating a field for the report...any help is greatly appreciated..thanks so much.

Use a Microsoft Access database to create the tables and column headings show in Figures 1-3 and discussed in the Background section. Create the tables in the design view. Populate the tables with the data as shown. Make sure you create a composite primary key field for the ORDERS table. The key should consist of the fields Invoice Number and Product Number to allow customers to order more than one item.


Customer
Customer NumberCustomer SchoolCustomer StreetCustomer CityCustomer StateCustomer ZipContact Name
105Central High123 Main StreetDenverCO80208Mary
107Central Middle35 South ParkDenverCO80278Sue
423JKF Elementary69 5th AvenueCheyenneWY90200Pat
516Toddler Time8000 ParkwayFt. CollinsCO80487Jan
799Georgetown High819 Rt. 909BoulderCO80303Jack






Product
Product NumberProduct NameProduct Price
10001Paper Plates$10.00
10002Paper Cups$20.00
10003Plastic Knives$18.00
10004Plastic Glasses$25.00
10005Paper Napkins$12.00


Orders
Invoice NumberCustomer NumberProduct NumberDateQuantity
1107100019/24/20054
21071000310/3/20053
31071000510/3/20055
44231000511/4/20054
57991000111/15/200510
67991000211/15/20052


Now establish relationships between your tables.

Creating Queries and Reports

Creating a Select Query

The owner wants to find out how much of each product is selling for the date ll/15/2005. Develop a query in the design view to give that information using the headings Date, Product Name, and Quantity. Save the query as Today’s Sales.

Creating another Select Query

Tomorrow, the owner is going to be in Denver, CO, and she would like to call on the customers there personally. Make a query to display the contact name, school, and street address ONLY for those schools in Denver. Save the query as Denver Schools.

Generating a Sales Report

Finally, make a report to show the dollar amount sold to each customer for each product. To create the report, you will need to:

•Make a query first and then bring that query into the Report Wizard.
•The query will contain a calculated field for Total Owed.
•The query should show the fields Customer School, Customer City, Date, Product Name, Quantity, and the calculated field, Total Owed.
•Name this query “Report Data”
•The report will be grouped by Customer School and Customer City, with subtotals for each school’s sales and a grand total.
•Make sure you delete any bogus total lines, and make all appropriate fields currency.


Deliverables

Three tables
Query output: Today’s Sales
Query output: Denver Schools
Query output: Report data
Report: Current School Sales
Defined relationships (I can press the relationships button and will see that the relationships between tables are defined)