Jia cost & benefit associated with going out to dinner is $58 and $63 respectively.
Basically, the calculation is about getting the amount that Jia spent and benefit during the dinner with her friend.
Calculation of Jia's cost
The cost includes expected cost of $40 for meal, $8 for tip (20%*$40) and $10 for Uber transport (To and fro)
= $40 + $8 + $10
= $58
In conclusion, Jay's cost associated with going out to dinner with her friend is $58.
Calculation of Jia's benefit
The benefit of the dinner includes $25 for meal valuation, amount of spending an evening with her ($30) and the $8 that she will spend if he doesn't go for dinner
= $25 + $30 + $8
= $63
In conclusion, Jay's benefit associated with going out to dinner with her friend is $63.
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