Internet rates for two companies are shown in the table. After how many months of service is the total cost the same no matter which company is used? What is this total
cost?

Intemet Service Provide
Charges

Tyson's Ethernet $100 activation fee plus $20 per month

Darriana's DSL
$30 per month

A 10 months, $300

B 20 months, $600

C 30 months, $700

D 2 months, $60

(No link’s please)