Pennsylvania State University’s commonwealth campuses will reduce their workforce by 10% this summer after 383 employees accepted the institution’s voluntary buyout offer last month. The combined salaries and expenses of the departing workers is $43 million, which could ease Penn State’s $49 million budget deficit. But officials Tuesday said some positions will need to be backfilled and that they will determine the actual cost savings later this year. The same day, Penn State also announced a campus restructuring plan that will bring 11 universities under the leadership of four chancellors.