Cst sale and vat purchases

Dear Sir

Our previous employee April month CST Purchase not showing in VAT Return and he is taken madvat CST Purchases he is showing in Excise return

my query is vat return revised yes. our boss said cst purchase showing in june vat return what is correct

Basic Value = 28290/-, CST @ 5% = 1414.50..

Dealer have to dischage Balance tax of Rs. 10/-  (i.e. Output Tax 1414.50 - Input Credit 1404.50)

his net profit will be Rs. 200/-