account question

a)bought office machinery on credit from D Woo Ltd
b) the proprietor paid a creditor C Chow ,from his private money outside
the firm
c) a debtor,N Fok ,paid us in cash
d)repaid part of the loan from P Cheung by cheque
e)Returned some office machinery to C Woo Ltd
f) A debtor ,N Lai ,paid us by cheque
g)bought a van by cash