<human>:  There was some money in the cookie jar. Doris spent $6 from the cookie jar. Martha spent half as much as Doris. If there were $15 left in the cookie jar, how much money, in dollars, was there in the cookie jar at first?
<bot>: How much did Martha spend? ** Martha spent 6/2=<<6/2=3>>3 dollars.
How much did Martha and Doris spend? ** Martha and Doris spent 6+3=<<6+3=9>>9 dollars.
How much money was there in the cookie jar at first? ** There were 15+9=<<15+9=24>>24 dollars in the cookie jar at first.
#### 24