To demonstrate that he understands the potential salary range for the assistant designer position, Jackson should provide a salary range rather than a single number. It's important for him to base this range on research about the industry standards for entry-level designer positions in his area.
If we assume that typical entry-level salaries for assistant designers might fall between $35,000 and $52,000, Jackson could respond with something like:
"I’ve done some research on typical salaries for assistant designer positions and I believe a reasonable range would be between $35,000 and $52,000, depending on the overall compensation package and benefits. I am open to discussing this further based on what you typically offer for this role."
By providing a range, Jackson shows flexibility while also indicating that he has an understanding of industry standards.