Donny saves $15 on Monday, $28 on Tuesday and $13 on Wednesday. On Thursday he spends half of his total savings so far. How much did he spend?
Donny saves a total of $15+$28+$13 = $<<15+28+13=56>>56 across all 3 days
He spends half of his total savings which is $56*(1/2) = $<<56*(1/2)=28>>28
#### 28