Question 762909
$50.40 for 1500kw
$50.40/1500 for 1 kw
$3.36 for 1kw
$50.80 for 1680kw
$5080/1680 for 1kw
$3.02 for 1 kw
Therefore 1840kw
should cost the Morgans 
(3.36 + 3.02)/2  (Average)
£3.19 * 1840
$58.70.
Hope this helps.
:-)