Answer:
Hello There the Correct answer is 8 + 24 x greater-than 864.
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Explanation</h3>
Step 1: 864-56= 608
Step 2: 24-8= 16
Step 3: 608/16=38
Alex bought all the string needed for $125.
It costs $18 for the remaining materials to make each puppet.
So if we closely observe then we see that here $125 is the fixed cost because its not going to change with number of puppets.
And the variable cost is $18.
In this case we can model a Total cost function C(x) for for x number of puppets as below

The total cost to make 50 puppets=$1025