You would divide the amount they saved over the period of time by the number of months they spent saving the money. In this case, from January to September would be 9 months. Therefore, $1314 divided by 9 would give you your answer - which is $146 per month.
They traveled 416.25 miles we now that they travel 55.5 in one hour and we know they traveled 7.5 hours, so multiply 7.5*55.5 which gives you 415.25 miles
