The ER2 options on Globex are $3.62 / RT for bundled (on the page cited above, the ER2 futures fall under the "All products not listed below" row).
The bundled RT charge for the futures contract is $4.80, and the unbundled is $4.72 on the first 150 RTs, $4.32 on the next 350 RTs, and $3.62...