To expensive, need more disc...

When S2 release it has less than 3 month BEP (include tax)
When S3 release it has less than 6 month BEP (include tax)
When S5 release it has less than 9 month BEP (include tax)
When S7 release it has more than 12 months BEP (include tax)

*All without incr of diff