please help! thank you!

(a) **As a small business owner, you currently sell handcrafted soap at $10 for a box of three. You would like to increase the profitability of your business and decide to increase price. Having studied consumer behavior, you are aware of Weber's law and that your regular customers usually do not notice price increases as long as they are 8% or less. How many price increases would you need to improve the profitability of the soap boxes by at least 25% relative to the original $10 price without your regular customers noticing? Show your calculations. [8]