Winsor Co$.$ records purchases at net amounts. On May $5$ Winsor purchased merchandise on account, $16,000,$ terms $2/10,$ n$/30.$ Winsor returned $1,200$ of the May $5$ purchase and received credit on account. At May $31$ the balance had not been paid.

By how much should the account payable be adjusted on May $31?($i want an equation with an answer $\text{'}296\text{'})$

a$.0.$

b$.344.$

c$.320.$

d$.296.$