Additional retail and transportation pushed Santa Clarita’s first quarter sales tax figures higher by 8.2 percent over last year, the city announced Wednesday. The increases from the first quarter ended March 31 will generate about $6.5 million for the city. The jump is the product of boosts in sales tax from several sectors, including general retail by 10.2 percent, transportation by 6.3 percent and construction by 13.1 percent. Business-to-business sales and restaurant sales also contributed to the boost. Sales tax contributes about 40 percent of the city’s general fund.