Answer:
3.85 years
Step-by-step explanation:
The payback period is the time that a company takes to recover its initial investment. Considering an initial investment of $8,500, and that cash flows are evenly distributed within each year, the payback period can be found by:
![\begin{array}{ccc}\ year&cash\ flow&balance\\1&\$1,400&-\$7,100\\2&\$2,300&-\$4,800\\3&\$3,100&-\$1,700\\4&\$2,000&\$300\end{array}](https://img.qammunity.org/2020/formulas/business/college/kg73o7l5xotxk1iktgts4c4cl552a4z505.png)
The payback period occurs sometime between years 3 and 4. The fraction of year 4 needed to reach payback is:
![f=(\$2,000-\$300)/(\$2,000)\\f= 0.85](https://img.qammunity.org/2020/formulas/business/college/mcua3x6l5dwumsnco5e4pe6yw8x90hvbav.png)
The company needs 3 years and 0.85 of the fourth year to break even. Therefore, the payback period for Vulcan Materials Company is 3.85 years.