There is no confusion in the statement annexed. Your take home salary will be Rs.52997 per month and your PF contribution at 12% of basic salary (Rs.2457/-) will be deducted from that . All others get into benefits which constitutes CTC which is Cost to Company. The employer contribution to PF, Gratuity, Insurance, Medical , Accident Insurance etc are the benefits which are spent by the company on your behalf.
The variable part of Rs.78000/-per annum will be given as variable pay only if your company achieves the orgnizational targets and you as an individual achieve your targets too. Only if these conditions are met you will be given the variable pay. In some organizations they scale it down and fix it to the extent of proportional target achieved.
Hope it is clear now to you
7th April 2019 From India, Tiruchirappalli