Grumpiness thrown in free!

If you own a business maybe you could take some advice from a consumer....

If you sell a $2.99 cotton reel, why not smile and help a husband who has no idea about such things? The same customer might be in the market for an overloker in a few months. But rest assured if you are really grumpy and unhelpful over the small item, he probably wont ask you for the large one.