In Gary's manufacturing plant, the estimated monthly overhend cost function is provided in the Y=m(X)+b format Total monthly overhead costs $1.05 (number of machine hours) + $5,600. Given this cost function, specify (a) the variable cost, (b) the foced cost, (c) the cost driver, and (d) whether these monthly overhead costs are considered variable. fxed, or mixed in total. (Rourd variable cost to 2 decimol placos, es 15251 Variablecost Fixed cost Costdriver Costtype