Analyze each plan according to the given specifications.
Plan A:
The basic fee must be added to the product of 0.13 and the average messages sent.
![29.95+190\cdot0.13=54.65](https://img.qammunity.org/2023/formulas/mathematics/high-school/bm0ats17ysoz818yjhdd79mbfoc8hjw7s4.png)
Plan B:
It already includes the cost for unlimited messages.
![53.00](https://img.qammunity.org/2023/formulas/mathematics/high-school/e0odik6r7tj8lye2c49tvpgvo0yjm1behn.png)
Plan C:
The plan costs the product of 0.28 and the average messages sent.
![190\cdot0.28=53.2](https://img.qammunity.org/2023/formulas/mathematics/high-school/2aoxwtpduajyatf4xtjnorb06lyukvzlu1.png)
When comparing these plans, the cheapest one is Plan B, which only costs $53.00.