Putting up the price for what you do to increase your profit is baulked at by most business owners I suggest it to.
No doubt it's because they fear the reaction they anticipate from their customers. Or they fear losing them completely.
But when you've cut costs as much as you can and cannot add more sales to the top line what is there left to do to increase profits?
You could buy new equipment, hire more staff or increase your stock to help drive sales further but these would eventually result in having to change prices to maintain the same level of profit. Additions come with additional costs.
It takes guts to increase your price as what you're really doing is saying: "I'm worth this much now and you, as my customer, are going to pay more."