Hi Valy,
Thanks so much for adding that screenshot! You’re definitely on the right track by checking out the wage category settings. The pay basis options (hourly or salary) are set up to match the most common ways to calculate someone's pay. The best choice for your first aid and laundry allowances depends on how you want these to be included in your employee’s pay slip, such as adding them each pay run or setting a fixed amount. To guide you through this, you can check out this link that outlines how each option works, and what to choose when it comes to pay rates.
Cheers,
Princess