I'm estimating a very low rate for Helen due to the limited information provided. Typically, retail managers with 22 years of experience could charge significantly more, but without a clear understanding of her specific role, industry standards, or location-based salary benchmarks, it's challenging to provide a more accurate estimate. For the sake of this exercise, I've rounded down to $25 per hour, which is an extremely low rate considering her experience. In reality, she could potentially charge much higher, but without more context, I'm being conservative.