Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Frequency | Callsign | Brand | City of License | Website | Webcast |
| --- | --- | --- | --- | --- | --- |
| 680.0 | KKYX | Country Legends 680 | San Antonio | kkyx.com | listen live |
| 720.0 | KSAH | Norteño 720 | San Antonio | • | • |
| 740.0 | KTRH | Newsradio 740 KTRH | Houston | ktrh.com | listen live |
| 760.0 | KTKR | Ticket 760 AM | San Antonio | ticket760.com | listen live |
| 990.0 | XET | La T Grande | Monterrey | • | listen live |
| 1030.0 | KCTA | KCTA 1030 AM | Corpus Christi | kctaradio.com | listen live |
| 1050.0 | XEG | Ranchera de Monterrey | Monterrey | rancherademonterrey.com | listen live |
| 1140.0 | XEMR | MR Deportes | Monterrey | • | • |
| 1200.0 | WOAI | News Radio 1200 | San Antonio | radio.woai.com | listen live |
| 1210.0 | KUBR | Radio Cristiana | San Juan | • | listen live |
| 1530.0 | KGBT | La Tremenda 1530 | Harlingen | latremenda1530.com | • |
Question:
Which long range AM station has the lowest frequency and includes a webcast of listen live, was licensed in the city of Monterrey, and uses the Callsign of xet?
Answer:
990.0