220(original price) * 0.25 = 55(saleAmount) salePrice = 165 165*0.1 = 16.5(CouponSavings) 165-16.5 = 148.5 The amount she spent on the jacket is $148.50
Zeros do not count as a sigfig so when you do something like this problem just include the numbers until you hit your significant figure limit and then substitute zeros where you can. 20000
