human
A pen costs $9 more than a pencil. If a pencil costs $2, find the total cost of both items.
assistant
How much does a pen cost? ** A pen costs $9 more than $2 which is $9+$2 = $<<9+2=11>>11
How much do both items cost? ** Altogether they cost $11+$2 = $<<11+2=13>>13
#### 13