$C(x,y)=570x+110y+3600$

$(a)InC(x,y),$ what does $3600$ represent?

$A.3600$ represents the fixed costs, $or$ the cost when $no$ items have been produced.

$B.3600$ represents the marginal cost $of$ producing one more phone cover when the number $of$ phone chargers $is$ held constant.

$C.3600$ represents the fixed cost, $or$ the cost when $3600$ phone chargers and phone covers have been produced.

$D.3600$ represents the marginal cost $of$ producing one more phone charger when the number $of$ phone covers $is$ held constant.

$(b)$ Find $\frac{\text{d}\text{e}\text{l}\text{C}}{\text{d}\text{e}\text{l}\text{x}}$ and $\frac{\text{d}\text{e}\text{l}\text{C}}{\text{d}\text{e}\text{l}\text{y}}.$ What $do$ these quantities represent?

$\frac{\text{d}\text{e}\text{l}\text{C}}{\text{d}\text{e}\text{l}\text{x}}=$

What does $\frac{\text{d}\text{e}\text{l}\text{C}}{\text{d}\text{e}\text{l}\text{x}}$ represent?

$A.It$ represents the fixed costs, $or$ the cost when $no$ items have been produced.

$B.It$ represents the marginal cost $of$ producing $1$ unit $of$ chargers when the production $of$ covers remains constant.

$C.It$ represents the marginal cost $of$ producing $1$ unit $of$ chargers and $1$ unit $of$ covers when both are held constant.

$D.It$ represents the marginal cost $of$ producing $1$ unit $of$ covers when the production $of$ chargers remains constant.

$\frac{\text{d}\text{e}\text{l}\text{C}}{\text{d}\text{e}\text{l}\text{y}}=$

What does $\frac{\text{d}\text{e}\text{l}\text{C}}{\text{d}\text{e}\text{l}\text{y}}$ represent?

$A.It$ represents the marginal cost $of$ producing $1$ unit $of$ chargers and $1$ unit $of$ covers when both are held constant.

$B.It$ represents the marginal cost $of$ producing $1$ unit $of$ covers when the production $of$ chargers remains constant.

$C.It$ represents the fixed costs, $or$ the cost when $no$ items have been produced.