Final answer:
The general percentage markup for retail products in a salon is typically around 100%, although this can vary based on several business factors. It's important to note though that some products may be marked up higher or lower than this depending on various business factors, but option d) 100% is generally used as a typical starting point for retail pricing.
Step-by-step explanation:
The general percentage markup for retail products in a salon is not a fixed value and can vary based on several factors such as product type, brand, competitive pricing, and salon strategy. However, a common markup in the retail industry, including salons, is often around 100%. This doubles the cost of the item to the salon when determining the retail price. It's important to note though that some products may be marked up higher or lower than this depending on various business factors, but option d) 100% is generally used as a typical starting point for retail pricing.