Pam runs a hot dog cart at the sports stadium. pam has no skills, no job experience, and no alternative employment. entrepreneurs in the hot dog cart business earn $19,000 a year. pam pays the rent of $1,500 a year, and her total revenue is $14,000 a year. she borrowed $1,000 at 10% a year to buy equipment. at the end of one year, pam was offered $700 for her business and all its equipment. a. pam's explicit costs are $_b. pam's implicit costs are $_c. pam's economic profit in the first year is $_