50 POINTS!! :) The graph shows the marginal cost of producing soccer cleats for Sabrina’s Soccer. At which level of production does the company make the most profit?

the first pair of cleats
the second pair of cleats
the third pair of cleats
the fourth pair of cleats

The following transactions occurred during july: received $1,000 cash for services provided to a customer during july. received $4,000 cash investment from bob johnson, the owner of the business received $850 from a customer in partial payment of his account receivable which arose from sales in june. provided services to a customer on credit, $475. borrowed $7,000 from the bank by signing a promissory note. received $1,350 cash from a customer for services to be rendered next year. what was the amount of revenue for july?