The Petty Cash Book is maintained on imprest system and the Petty Cash Book balance on April 1, was OMR 4,000. The amount reimbursed on May 1 was OMR 3,500. What is the amount of petty cash expenses during April? a. OMR 4,000 O b. OMR 3,500 O c. OMR 500 Od. OMR 7,500