I don't have the figures to show the total costs.
For National Defence, requesting the Canadian Rangers' assistance does not involve a financial cost itself; it depends on the Rangers' availability in a specific community. Often, the Canadian Rangers wear several hats in a community, so it may be that they are already involved in search and rescue activities, but under another responsibility.
To tell the truth, the cost is calculated more in terms of human capital. In a small community, it really is a race, when the people join efforts to find someone who has gone out onto the land for economic or traditional activities.