Use the following information to answer the question below

  01/01/2016 31/12/2016
Trade debtors-------80,000 100,000
Trade creditors-----30,000  40,000
Stock-----------------70,000 90,000

Cheques received from trade debtors in 2016: 350,000
Payment made to trade creditors in 2016: 220,000

Credit sales for 2016 is?