Since the price of each bike is $115, so for x bikes it will be $115x.
Since there is a fixed amount of $158000 that also spends on production, so add $158000 to $115x to find the cost function C(x):
In the above expression, The x is the number of vehicles that can not be negative and not in fraction:
So the domain will be x>0 and x is W where W is the whole number:
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