Ribbons and Bows uses job order costing. At the beginning of July, there is only one job in Work in Process, Job 17, with costs to date of $24. During July, costs of $12 are added to Job 17, and the job is completed. Job 18 is started in July, and $30 of cost is recorded on the job cost sheet. Job 18 is also completed in July. Job 19 is started but not completed in July, and $45 is added to that job cost sheet. What is the balance in the Work in Process Inventory account at the end of July?