Differnt Tax rate in same item

Differnt Tax rate in same item

Hi we are in manufacturing of Kurtis and the tax slab for the same is 12% if the value is greater than or equal to 1000 and 5% if the value is less than 1000.

So lets say we have a garment worth 1095/- which we are selling at 12% GST in India but sometimes due to less demand we may sell some quantities at 995/- which will bring down the tax to 5% instead of 12%. 
How can we do it uzing Zoho books . Any help is appreciated.

Thanks,