Multiple calculation formula

[VIKKIJJ]

Here's a sample of the data:

USAGE	CURRENT PRICE	A	B	C	D	SAVINGS
936	0.1204	0.1050	0.2163	0.1120	0.1303

I need to find lowest price within A-D (MIN) and subtract it from the current price, then get a savings total by multiplying the usage amount to the total of the first calculation. Can someone help?? Total should come to $14.42

[JieJenn]

=(b2-min(c2:f2))*a2

[shg]

=usage * (current - min(a,b,c,d))

[VIKKIJJ]

Thank you so much!! I have been wracking my brain all day!