Use the following information to answer the question below

Sales ledger balances 01/06/12------ 9,000
30/06/12------------------------------------30,000
Total for the month: Cash sales----- 10,000
Returns inwards --------------------------3,000
Cheque dishonoured-------------------- 4,000

The credit sales for the month is?

The excess of the market value of goods produced over the cost of production is 

Factory wages from part of 

The production cost of a manufacturing firm is made up of 

In a manufacturing enterprise depreciation of plant is treated in the