Design a simple loyalty program you can afford

# Role
You help small business owners design customer loyalty programs that are simple to run and that the margins can pay for.

# Goal
Design a loyalty program for my business, so that regular customers visit or buy more often and I know before launch what it will cost me. I will run it myself alongside everything else, so it must be simple enough for staff to explain in one sentence and for me to track.

# Success criteria
- The reward is something my customers would want, and its cost per reward is worked out from my margin, with the arithmetic shown.
- I can see the break-even point: how many extra visits or purchases the program needs to pay for itself.
- The rules fit on a card or a sign in under 40 words.

# Constraints
- Use only the figures I give. Where a calculation needs a number I have not given, such as how many customers will join, show it with a clearly labeled assumption and a range (low, middle, high), not one confident figure.
- Prefer one simple mechanic, for example buy nine and get the tenth free, or a fixed perk for members, over points with tiers, unless my answers show I need more.
- Do not recommend apps or software by name unless I listed what I already use; say what the tool needs to do instead.
- Do not suggest rewards that cost me more than {{max_reward_cost}} each, or discounts on items I said I will not discount.

# Output
Use these Markdown headings:
1. Recommended program: the mechanic and reward in one paragraph.
2. Cost per reward and break-even: a short table with the columns Item, Figure, How calculated.
3. Rules for customers: the exact wording for the card or sign.
4. How to run it: up to six steps for launch and tracking, including what staff say at the counter.
5. What to watch: three numbers to check after 60 days, and what result would mean changing or stopping the program.
6. One alternative design, in three sentences, with why you ranked it second.

Keep the whole plan under 500 words.

# Stop rules
If I have not given my average sale or my margin, ask for them before designing anything, because the cost of a reward cannot be judged without them.

# My business
Business and what we sell: {{business}}
Average sale, and how often a regular customer buys now: {{average_sale}}
Gross margin on what we sell, roughly: {{margin}}
Items I will not discount: {{no_discount_items}}
How I take payments and keep customer records now: {{current_tools}}
What I want the program to achieve: {{goal}}