Above is the latest (newly concluded with the union) basic salary of SIA cabin crew. The starting basic salary is either S$1,340 or $1,490 (with university degree) and the maximum/highest for the most senior cabin crew (IFS or Inflight Supervisor) is $4,135.
The above does not include allowances like LMA (location meal allowance), IFA (incentive flying allowance), Laundry Allowance, Transport Allowance etc.
The major part of the take-home pay of the crew besides the basic salary is the LMA and IFA which can averaged out to be $3,000 per month.
The salary is negotiated with the union every 4 years.
For IFA payment read this blog