Canada Pension Plan NR4 with Code 46

Please some clarification.  I believe I'm understanding correctly that the CPP on NR4 would report like SSA-1099.  My wife has spousal benefits from SSA reported on SSA-1099, and also Canada Pension Plan benefits reported on NR4 with a code 46.  Do I merely add the SSA-1099 box 5, with her NR4 box 16 (with CAD converted to USD)?  Also, when converting her CAD amount to USD, is it acceptable to use the IRS Yearly Average Currency Exchange Rates for Canada $$$ to US $$$ (1/1.301)?