use the border crossings data below to calculate a 2 -month weighted moving average (wma) forecast for truck crossings and predict the number of truck crossings for september 2018. use the weights of 0.7 and 0.3 for the 2 -month wma, where the first weight is used for the most recent month and the last weight is used for the least recent month. round your answer to two decimal places, if necessary. 2018 month number of truck border crossings january 184,060 february 178,058 march 194,180 april 198,066 may 200,723 june 193,582 july 193,504 august 207,528