For individual samples, a minimum of 10µl should be sent. If you are using the same primer on multiple samples, we require just 3µl multiplied by the number of reactions you are doing with that primer, but still a minimum of 10µl.
For full plates we need 100µl of primer at 10µM per plate. If you are sequencing multiple plates that will use the same primer, send 100µl plus 30µl for each additional plate.
If you are submitting a primer plate, include at least 10µl of primer at 10µM per well of the primer plate.