Before departing for their summer tour, the Central College A Cappella choir will perform for the last time in Pella this academic year. They will sing on Sunday at 4 p.m. at Second Reformed Church in Pella. Choir Director Mark Babcock says they have been preparing a variety ranging from 19th-century to contemporary choral compositions and Brazilian and American folksongs. The event is free and there will be a free will offering to help offset costs of the tour. After the concert, the choir’s seniors will be honored.