Answer:
June 9th
R Allen Account  1,450 debit
 Sales Revenue       1,450 credit
June 12th
Cash           900 debit
 Sales Revenue       900 credit
June 27th
B. Kraft Account  1,000 debit
 Sales Revenue       1,000 credit
Explanation:
On the sales journal we will only post transactions which refers to sales. not their cost nor their collection.
There are three sales during the month so we report these.
Sales revenue will always be credited.
Then Cash will be debited for cash sales
An account recievable when the customer is not paying the sale on cash.