Original sentence: Given the average price of electric power around $50 per megawatt hour, this puts a lower limit on the cost of antimatter at $2.5 million per gram.It has been claimed by some proponents of antimatter energy that a highly idealized factory using some yet-uninvented technologies could operate at $25 billion per gram
Edited sentence: Given the average price of electric power around $50 per megawatt hour, this puts a lower limit on the cost of antimatter at $25 billionper gram.It has been claimed by some proponents of antimatter energy that a highly idealized factory using some yet-uninvented technologies could operate at $2.5 million per gram