Government action and inaction is the major contributor to inflation
Prices may come down for a short time for the sales events. However, much of the stuff on sale is going to be out of fashion soon so our gain is questionable. In any event those sales last for a few weeks at most and then the prices are back up again, often to higher prices than they were prior to the sales.
In recent months we've also seen fluctuating petrol prices. The latest kite flying from the government would suggest that we're not going to enjoy any reductions much as they are now considering adding a charge on petrol prices to build up the National Development Plan Fund.