<human>:  Yulia was able to net $44 in profit this week. Her lemonade stand made a gross revenue of $47 this week. She was also able to babysit and made $31. However, her lemonade stand is expensive to run because she needs to buy lemons, sugar, and sunscreen. How much did she spend to operate her lemonade stand, in dollars?
<bot>: How much did Yulia make in total? ** Yulia's total gross revenue was $47 + $31 = $<<47+31=78>>78.
How much did Yulia spend to operate her lemonade stand? ** To calculate her overhead we must subtract her total profit from her gross revenue which is $78 - $44 = $<<78-44=34>>34.
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