If you need 10 mins (1 standard row), it costs 25 or 2.5 each;
if you need 20 mins (2 standard rows), it costs 60 or 3.0 each;
if you need 30 mins (3 standard rows), it costs 105 or 3.5 each;
if you need 40 mins (4 standard rows), it costs 160 or 4.0 each;
in other words, for each extra row, the unit cost goes up by 0.5 ecs.
if you need 20 mins (2 standard rows), it costs 60 or 3.0 each;
if you need 30 mins (3 standard rows), it costs 105 or 3.5 each;
if you need 40 mins (4 standard rows), it costs 160 or 4.0 each;
in other words, for each extra row, the unit cost goes up by 0.5 ecs.
Leave a comment: