Alicia is the owner-operator of Cool Beans, a local coffee shop. For the past year, Cool Beans sold 243,000 drinks at an average price of $3.36 per serving. Her average variable cost per serving was $1.12. Currently, she has been using local TV and newspapers to generate interest and awareness at a cost of $170,000 per year. She recently contacted Brushfire Social Media and they estimated they could reach the same number of people in her community with a social media budget at half the cost, though it would require an additional one-time investment of $11,000 in their website and social platforms. As an additional option, Brushfire suggested a separate promotional campaign that would offer a $1 discount to any person who likes their social media page. Brushfire estimates that Cool Beans would sell an additional 6,000 cups with this discount and this new campaign would cost $2,500.

What is the margin for coffee sold with the promotional discount?