Manufacturing activity increased last month in a nine-state region that includes Missouri, a survey of purchasing managers showed. It was the regional index’s first increase since March, and it suggests the economy will continue to grow through the end of this year, said Ernie Goss, director of the economic forecasting group at Creighton University, which did the survey. Goss also said in the university’s report that inflationary pressures rose in the survey and that purchasing managers expect a 4.6 percent increase in the prices of items they will buy in the coming year. The national index also saw an increase in its price readings. “I am concerned that this may be the first signal that the period of benign inflation is over,” Goss said.