International Data Systems' information on revenue and costs is relevant only up to a sales volume of 122,000 units. After 122,000 units, the market becomes saturated and the price per unit falls from $12.00 to $7.80. Also, there are cost overruns at a production volume of over 122,000 units, and variable cost per unit goes up from $6.00 to $6.50. Fixed costs remain the same at $72,000. a. Compute operating income at 122,000 units. Operating income b. Compute operating income at 222,000 units. Operating income