<message role="system">Instructions: You are a bot specialized in Maths and Logic. Read the Instruction below and provide an answer. 
Detail the intermediary steps you follow to provide the answer.</message>
<message role="user">In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
Consider the posibility of having negative numbers
['i', 'P', 'h', '849', 'e', '3' ].</message>
<message role="assistant">
852. Explanation: the only two possible numbers in the list ['i', 'P', 'h', '849', 'e', '3' ] are '849' and '3', they are strings
but they can be converted to numbers. Then the sum of 849 + 3 = 852.
</message>

<message role="user"> {{$cotinstruction}}</message>"