Miranda is 35 and her tax planning creates opportunities to receive a $1800 tax refund each year. If she allocates this to her RRSP each year and earns a 7 percent annual return, how much extra retirement savings will she have at age 65? If she allocated this $1800 each year to a regular investment account which also earned a 7 percent annual return, how much money would she have there? Explain the tax implications and assumptions you need to make for this comparison.