Best electricians in Mount Dandenong

Hi there, Adam quoted $65 per hour on his email response, he arrived at 11am as my security system can verify arrival time. (very prompt) left after completion at approx 2.30 pm that's 3.5 hours x $65 per hour = $227.50 for labour. Bill of materials as follows 2 x ethernet single port wall plates ($29.90), 1 x Dual Ethernet indoor plate (28.99), 1 x Dual outdoor power point ($25.85), 1 x indoor power point ($14.00) and approx 42 meters of CAT6 cabling @ .88 per meter ($36.96) allowance of $50 for silicone that was advised already half a tube, Cat6 cable advised @ $3 for a 2Mtr pre made length as customer supplied Ethernet cables were untilised in installation. sub total $413.20 how ever total bill came to $500, i guess the $86 was of other unknown ancillary parts?. I have no argument with Adams professionalism and would recommend him to anyone seeking a well presented knowledgable electrician. Just ask prior to commencing work for a written quote for budgeting purposes.