Answer:
a.
![c(x) = 2x + 105](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q6p313uv0xrktos6rumf6sh6670t5fhhtk.png)
b.
![c(50) =\$205](https://img.qammunity.org/2020/formulas/mathematics/middle-school/si91k63gug5ewxptomu086n6x8xrtvjwu3.png)
Explanation:
The variable cost of $ 2 implies that for each manufactured calculator the total cost increases $ 2.
The fixed cost of $ 105 implies that regardless of the number of manufactured calculators there will always be a cost of $ 105.
If we call x the number of manufactured calculators then the total cost c(x) will be:
![c(x) = 2x + 105](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q6p313uv0xrktos6rumf6sh6670t5fhhtk.png)
Then, the cost of manufactured 50 calculators a day is:
![c(50) = 2(50) + 105](https://img.qammunity.org/2020/formulas/mathematics/middle-school/7vvz91jfbv3tww81zxyhqob8owwq91gjc7.png)
![c(50) = 100 + 105](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1i1nc58u99s0zvt6ttl50uueml3i8487st.png)
![c(50) =\$205](https://img.qammunity.org/2020/formulas/mathematics/middle-school/si91k63gug5ewxptomu086n6x8xrtvjwu3.png)