Essentially the commanders had 2, 3rd rounders. One from the Eagles, 72nd pick and their original pick, 93rd overall.
According to the draft chart, I believe he used Jimmy Johnsons points chart to calculate basically "How good is this trade really?" Loomis gets smoked in the trade. Saints got their 93rd pick, where as the 72nd pick is way more valuable, hence the 230 point grade. All the picks Saints got, 93, 131 and 182nd only amount to 188 points, plus Loomis threw the 5th rd sweetner into the deal by sending it to Washington which is 34 more points, meaning Washington won that trade bigly as they come out much better.