What is 66,666 times 66,667?

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons

Based on the spreadsheet below, which of the following is a true statement?

What is the approximate mark up percentage rate before m equals $1740 marked up from p equals $19,422