Step-by-step solution-:

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)**:

C(x)=\$115x+\$158000

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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