1) when adding the cart display manager to the page, go to the second step here you can select the cart columns to be included in the display, you can select to include the height and width columns.
if you prefer not to re run the cart display wizard, open the bindings panel, exapnad the cart object binding group, you can then add the bindings for the hieght and width columns to the display.
2) Go to the Server Behaviors panel, you will see a listing for the add to cart button server behavior, double click it to edit it.
3) Edit the eCart object, on the taxes tab you can define different tax rates. the shipping province will be stored in a session variable named:
eCartCheckoutForm_shipping_state_province
you can create a tax rule for each province using the triggers:
If session Variable exists:
eCartCheckoutForm_shipping_state_province
AND
Based on Session Variable value - if the session variable "eCartCheckoutForm_shipping_state_province" is "=" a value of "<province abbreviation>"
where <province abbreviation> is the abbreviation for the province.
for the calculation use:
Based on taxable total "times" "<tax rate>"
where <tax rate> is the tax percentage as a decimal number.