A cash budget by quarters for the Carney Company is given below (note that some data are missing). Missing data amounts have been keyed with either question marks or lowercase letters (a, b, c, etc.); these lowercase letters will be referred to in the questions that follow. (It may be necessary to calculate a value for items where a question mark appears.) The company requires a minimum cash balance of at least $10,000 to start a quarter. All data are in thousands of dollars. What is the cash disbursed for purchases during the second quarter (item c), in thousands of dollars