I requested a quote from SLEEP'S PLUMBING, I'm so glad I did....
A very friendly guy from Sleep's Plumbing came to the house looked at the drain (outside the kitchen sink gully trap) and quoted $165, using a tool, he told me it would be $345 if he had to use a water jet or a machine. It took him about ten minutes all up using a long tool. The blockage was caused by fat and oil from washing dishes in the kitchen sink.

For our first call, sorry to say that yes they came around to check plumbing and give us the quote for a big job. Then they never called up or turned up. So we never bother to call them for 2 years we never had our shower or hot water system...before we get another Plumber and do the job in 4 hours total easy with such wisdom than the former one!!! You know, PLUMBING can be really painful to call mostly all of them before you get the best or available for you especially if it's emergency but other Plumbers won't see it that way when others do!!! What a difference!