the lessee agrees to deposit with the lessor at all times the sum of baht 165,600 equal to 3 times the monthly rent currently applicable. this sum shall be held by the lessor throughout the term of this agreement (including any extension (if any)) as security for any damage or loss the lessor may suffer by the breach or non-performance or non-observance of any of the covenants on the part the lessee stipulated in this agreement or any other related agreement