Refer to the Table Shown A) $110
B) $120

Refer to the table shown. If the output of bicycles is 4 per week, the marginal cost of producing another bicycle per week is: $$\begin{array} { | c | c | } \hline \begin{array} { c } \text { Output } \\\text { (bicycles per week) }\end{array} & \text { Total cast (dollars) } \\\hline 1 & 100 \\\hline 2 & 200 \\\hline 3 & 310 \\\hline 4 & 440 \\\hline 5 & 580 \\\hline 6 & 730 \\\hline 7 & 900 \\\hline 8 & 1,200 \\\hline\end{array}$$

A) $110.
B) $120.
C) $130.
D) $140.