Consider the following statements regarding absorption costing and variable costing.

i. Profit reported under absorption costing for a year will likely differ from that reported under variable costing because production and sales differ.

ii. Total profit when added together over a ten-year period will be approximately equal under absorption costing and variable costing because production and sales will be approximately the same.

iii. Total profit when added together over a ten-year period will be significantly different under absorption and variable costing because fixed costs will generally increase significantly over that long.

Which statement/s is/are true?