Please Hurry, I need answer right away.

The prices of two different-sized
bottles of laundry detergent are listed
below.
Laundry Detergent
$19.99 for 150-ounce bottle
$14.99 for 100-ounce bottle
Which expression represents the amount
of money, in dollars, saved by buying a
total of 600 ounces of laundry detergent
in 150-ounce bottles versus 100-ounce
bottles?
J 4(14.99) 6(19.99)
6(14.99) - 4(19.99)
L (6-4) (19.99 - 14.99)
K
M [150 (19.99) 100 (14.99)] + 600
N [(150 - 100) (19.99 - 14.99)] + 600