Responsible Margin Management

I live in Somerset West. The Checkers and PnP branches is right opposite each other in the main road. I would to thank Checkers for being responsible in managing their margins. I prefer going to Checkers to buy groceries as the prices are stable across the product range. The way PnP manage their margins is very annoying. Making some items slightly cheaper than normal, but then hitting their customers with expensive prices on other products. I do however go to PnP when in a hurry. Their one line system works better and Checkers has never enough till points open. Standing in a queue for at least 5 mins every time. Please employ more staff at the till points. Thank you