# Exercise: Read shopping list table in variable and calculate total

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The answer to the exercise will be included and explained if you attend the relevant Wise Owl course (sadly, only in the UK for now).

 Category ==> SSIS Integration Services  (40 exercises) Topic ==> Previous versions  (18 exercises) Level ==> Average difficulty
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The aim of this exercise is to read in a shopping list and calculate the total amount of money it will cost to buy:

 The shopping list What the package should show

To get started, run the script in the above folder to create a table called tblList, then create a package called Aldi or Waitrose.

Create the following variables (strictly speaking you don't need the last one):

The ShoppingList variable will hold the table records.

Now create the control tasks to make this work:

The SQL script to begin should be something like SELECT ItemName, Quantity, Pence FROM tblList.

Here's the script you could use:

// display total value of all items (price * quantity)

decimal TotalValue = Convert.ToDecimal(

Dts.Variables["TotalValue"].Value);

MessageBox.Show("Total value of all items is £" +

(TotalValue/100).ToString("#,##0.00"),"Shopping list");

Test that this package gives £8.14 when run as the total!