The simplified version would be 8nx - 7p - 6x
3088.22813276
hope this helps, you could've entered this into a calculator for next time.
ANSWER
EXPLANATION
The sum of the first 
terms of a geometric sequence is given by;
Where , is the number of terms and 
is the first term.
When 
, we have 
, we get;
Dude I don’t think using this for an exam is it but ok
Answer:
Company G charges 5 more dollars per hour than Company H.
