WESTBOROUGH, MASS. — Kelleher & Sadowsky has orchestrated the sale of a 3,960-square-foot office building in Westborough for an undisclosed price. The property is located at 32-36 Milk St. in downtown Westborough, approximately 34 miles west of Boston. Drew Higgins of Kelleher & Sadowsky represented the buyer, Francis Vaccaro of Masis Staffing Solutions, in the transaction. The seller was undisclosed.