Presented below are the ending balances of accounts for the Kansas Instruments Corporation at December 31, 2021. Credits $ Debits 39,000 168,000 43,000 119,000 22,000 $ 24,000 51,000 69,000 1,680,000 639,000 Account Title Cash Accounts receivable Raw materials Notes receivable Interest receivable Interest payable Investment in debt securities Land Buildings Accumulated depreciation-buildings Work in process Finished goods Equipment Accumulated depreciation-equipment Patent (net) Prepaid rent (for the next two years) Deferred revenue Accounts payable Notes payable Restricted cash (for payment of notes payable) Allowance for uncollectible accounts Sales revenue Cost of goods sold Rent expense 61,000 108,000 338,000 149,000 139,000 79,000 55,000 199,000 590,000 99,000 32,000 1,180,000 469,000 47,000 Additional Information: 1. The notes receivable, along with any accrued interest, are due on November 22, 2022. 2. The notes payable are due in 2025. Interest is payable annually. 3. The investment in debt securities consist of treasury bills, all of which mature next year. 4. Deferred revenue will be recognized as revenue equally over the next two years. Required: Determine the company's working capital (current assets minus current liabilitles) at December 31, 2021. (Amounts to be deducted should be indicated by a minus sign.) Current assets: Total current assets Current liabilities: Total current liabilities Working capital