Use the IS-LM-BP model to illustrate the following statement

"The sharp drop in commodity prices has inevitably meant lower incomes and wealth for Canadians. And we have had no choice but to adjust. Because we are on a floating exchange rate, much of the adjustment has taken place through a decline in the external value of the Canadian dollar. Had we been on a fixed exchange rate, we would still have had to adjust. But the adjustment would have been more difficult, since it would have had to come mainly through downward pressure on output, employment, and wages.