I think the entry would be
Purchase A/c dr
to Supplier A/c
Being goods purchased.
expense a/c Dr
to Purchase A/c
Being used for office use.
If a Company has Purchased 100 bags Taxable Item from suppliers for sale, but these bags out of 20 bags used for our office use i.e. Expenses ...So What is entry made in Tally .ERP 9 ?