What is the quick ratio, cash ratio, for Chipotle 2017? Please explain.

CHIPOTLE MEXICAN GRILL, INC. CONSOLIDATED BALANCE SHEET (in thousands, except per share data) December 31, 2017 2016 Assets Current assets: Cash and cash equivalents S 184,569 87,880 Accounts receivable, net of allowance for doubtful accounts of $O and $259 as of 40,453 19,860 50,918 9,353 324,382 629,535 December 31, 2017 and 2016, respectively 40,451 15,019 44,080 5,108 329,836 522,374 1,338,366 1,303,558 125,055 Inventory Prepaid expenses and other current assets Income tax receivable Investments Total current assets Leasehold improvements, property and equipment, net Long term investments Other assets Goodwill Total assets Liabilities and shareholders' equity Current liabilities: 55,852 21,939 53 21,939 $2,045,692 $ 2,026,103 $ 82,028$78,363 01 127,129 281,793 288,927 18,944 33,946 623,610 Accounts payable Accrued payroll and benefits Accrued liabilities Total current liabilities Deferred rent Deferred income tax liability Other liabilities Total liabilities Shareholders' equity: 82,541 159,324 323,893 316,498 814 40,042 681,247 Preferred stock, $O.01 par value, 600,000 shares authorized, no shares issued as of December 31, 2017 and 2016, respectivel Common stock $0.01 par value, 230,000 shares authorized, and 35,852 and 35,833 shares issued as of December 31, 2017 and 2016, respectively Additional paid-in capital Treasury stock, at cost, 7,826 and 7,019 common shares at December 31, 2017 and 2016, respectively Accumulated other comprehensive income (loss) Retained earnings 359 358 1,305,090 1,238,875 (2,334,409) (2,049,389) (8,162 2,220,811 1,364,445 1,402,493 $2,045,692 $ 2,026,103 659) 2,397,064 Total shareholders' equit Total liabilities and shareholders' equit