A pricing calculator with graduated per-member pricing beside three tier cards. Tier Card component props: name, minMembers, maxMembers, rate, description. Drag the team size slider (a native input, arrow keys included) and switch Monthly/Yearly (a native radiogroup, works without JavaScript); JS computes the live total across the graduated tiers, shows the breakdown such as "10 × 12 + 14 × 10", the average per member, and highlights whichever tier card matches the current team size.