A contractor is managing three different job sites It cost her $c to employ a carpenter, $p to employ a plumber, and $e to employ a electrician the total cost to employ carpenters, plumbers, and electricians at each site is

Cost at site 1 =12c+6p+5e

Cost at site 2 =13c+9p+2e

Cost at site 3 =16c+p+7e

write an expression in terms for the following

a. the total employment cost for all 3 sites

b. the difference between the employment cost at site 1 and site 3. Assume the cost at site 1 is larger than the cost at site 3

c.the amount remaining in the conductors budget after accounting for the employment cost at all three sites, given that originally the budget is 49c+23p+23e