She probably spends $15 a day on lunch too.
Brew my own, bag my lunch. Allow for occasional lunches out to celebrate a birthday, etc. Every penny counts.
I remember an old expression, watch the pennies, the dollars take care of themselves.
I still mix hot water with Nescafe instant, takes less time and is served hot. By the time all these esoteric coffees make it to my table or hand, it's not hot enough...