Purchasing of goods 690000- freight in on purchase 25000- sales 900000- end inventory 70000- markup 25% based on cost calculate beginning inventory ?

beginning inventory +purchasing + freight - ending inventory = COGS 

because the sales markup based on cost 

COGS =900000/1.25=720000

thus beginning inventory equal 

-25000 +70000 

beginning inventory equal75000 

Seventy five thousand only..

SALES + CLOSING INVENTORY   =   OPENING INVENTORY + PURCHASES + INWARD EXP. + GROSS PROFIT

I.E.

OPENING INVENTORY= SALES+ CLOSING INVENTORY-PURCHASES - INWARD EXP -GROSS PROFIT

=900000+70000 -690000 -25000 -180000

=75000

GROSS PROFIT IS =20% ON SALES

Well i guess it can be calculated as follows:

Open= (COGS+ Ending inventory)-(Purchases+Carriage in+Opening)

So

Cost of goods Sold=900000*100/125=720000

+

Ending inventory=70000

Opening inventory=790000-() =75000

Yes,75000 is the right answer .................

Opening inventory +purchasing + freight - closing inventory =  cost of sale. The markup is based on cost 

So

Cost of sale =900,000/1.25=720,000

thus op inventory equal 

-25000 +70000 

op inventory equal to75000 

Sale                                              900,000

COGS

Opening Inv.          75,000  (Working Figure)

Purchases          690,000

Frieght Inward      25,000

Closing Inv.           (70,000)

COGS                                         (720,000)                               (900,000/1.25) Markup

Gross Profit                                180,000

So, the ans is75,000.

Beginning inventory=(70000+720000)-(690000+25000)

I AGREE WITH YOUR ANSWER MR AHMED  

opening stock of the above question is75000