Consider the following table of long-run total costs for three different firms:

Quantity	1	2	3	4	5	6	7
Firm A	10	21	32	43	54	66	80
Firm B	10	15	18	23	35	50	65
Firm C	10	19	28	37	46	55	60

Indicate whether each firm experiences economies of scale or diseconomies of scale. (Note: If a firm experiences economies of scale in one region and diseconomies of scale in another, make sure to select both columns.)

Firm	Economies of Scale	Diseconomies of Scale
A	?	?
B	?	?
C	?	?