Part a at the toaster company, the weekly cost to run the factory is $1400 and the cost of producing each toaster is an additional $4 per toaster. choose a function rule representing the weekly cost in dollars, f(x), of producing x toasters. a f(x)=1400x+4 b f(x)=4x+1400 c f(x)=4x−1400 d f(x)=1400−4x