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Accounts payable and accrued expenses: (Tables)

12 Months Ended

Dec. 31, 2020

Accounts payable and accrued expenses:

Schedule of accounts payable and accrued expenses

			December 31,
		2019			2020
Suppliers		Ps.	245,100		Ps.	353,885
Taxes payable			175,573			57,174
Use rights of assets under concession			269,916			5,070
Accounts payable to related parties (Note 14.1)			97,312			53,256
Lease payable (Note 7.1)			20,422			17,236
Salaries payable			149,452			128,105
Sundry creditors for services provided			803,746			640,068
Accounts payable to contractors			37,809			343,610
Total		Ps.	1,799,330		Ps.	1,598,404

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