Regarding your final attached quotation and considering that we would be your fidelity customer and also for the Gas furniture , please be so kind to delete the extra cost for the fitting and pipe (was just 50cm of pipe installed) and general expense item (we already paid 53.000 Baht in origin quotation).
So I agreed to accept extra cost for the additional components: item 1.1, 1.2, 1.3 (10.500 Baht), installation work item 3 ( 2.300 Bath) and site expensive item 4.1 (15.000 Baht) for the total bill of 27.800 Baht.