The Shipping Calculator is controlled by a special Channel Advisor Macro which pulls it into the required area.

The Macro/template tag can be added to any customizable area within the Frooition listing template (custom HTML boxes/description area/5 tab area at the bottom of the page), and will then display as requested.

The macro that you will need to insert in order for this to show up is as follows:
Shipping Calculator = {{SHIPCALC_WIDGET}}