Nouveau code

let followers_to_price = follower_count => {
  if (follower_count < 50000) {
    let price_range_post = {
      min: 100,
      max: 300,
      diff: 300 - 100,
    };
    let price_range_story = {
      min: 10,
      max: 100,
      diff: 100 - 10,
    };

    return {
      post: price_range_post.min + (follower_count * price_range_post.diff / 50000),
      story: price_range_story.min + (follower_count * price_range_story.diff / 50000),
      giveaway: 1.25 * (price_range_story.min + (follower_count * price_range_story.diff / 50000)),
    };
  }
  else if (follower_count < 100000) {
    let price_range_post = {
      min: 300,
      max: 600,
      diff: 600 - 300,
    };
    let price_range_story = {
      min: 100,
      max: 300,
      diff: 300 - 100,
    };

    return {
      post: price_range_post.min + (follower_count * price_range_post.diff / 150000),
      story: price_range_story.min + (follower_count * price_range_story.diff / 150000),
      giveaway: 1.25 * (price_range_story.min + (follower_count * price_range_story.diff / 150000)),
    };
  }
  }
  else if (follower_count < 250000) {
    let price_range_post = {
      min: 600,
      max: 1000,
      diff: 1000 - 300,
    };
    let price_range_story = {
      min: 300,
      max: 500,
      diff: 500 - 300,
    };

    return {
      post: price_range_post.min + (follower_count * price_range_post.diff / 150000),
      story: price_range_story.min + (follower_count * price_range_story.diff / 150000),
      giveaway: 1.25 * (price_range_story.min + (follower_count * price_range_story.diff / 150000)),
    };
  }
  }
  else if (follower_count < 500000) {
    let price_range_post = {
      min: 1000,
      max: 5000,
      diff: 5000 - 1000,
    };
    let price_range_story = {
      min: 500,
      max: 1500,
      diff: 1500 - 300,
    };

    return {
      post: price_range_post.min + (follower_count * price_range_post.diff / 500000),
      story: price_range_story.min + (follower_count * price_range_story.diff / 500000),
      giveaway: 1.25 * (price_range_story.min + (follower_count * price_range_story.diff / 500000)),
    };
  }

  let price_range_post = {
    min: 5000,
  };
  let price_range_story = {
    min: 1500,
  };

  return {
    post: price_range_post.min + ((follower_count - 1000000) * price_range_post.min / 1000000),
    story: price_range_story.min + ((follower_count - 1000000) * price_range_story.min / 1000000),
    giveaway: 1.25 * (price_range_story.min + ((follower_count - 1000000) * price_range_story.min / 1000000)),
  };
}