$\frac{6}{9}$ A drilling bid of $$9,900$ was accepted by their first customer for

a job to start on $\frac{6}{12},$ the contract was signed on $\frac{6}{9}.$

$\frac{6}{19}$ Bid a second job for $$15,900$ and received a $$5,900$ cash payment

in advance $($job is to start on $6/25)$ contract was signed $6/19.$

$6/21$ Completed the well drilling job started on $6/12$ and billed the

customer for the agreed contract price.

$6/28$ Paid the advertising bill received from Baker City Farm News.

$7/2$ Paid employee's wages for June. Note: since it was for a short

Month $(\frac{6}{8}-\frac{6}{30})$ total paid was prorated in the amount of

$$2,850.$

$\frac{7}{3}$ Paid $$1,000$ on account for the supplies purchased on $\frac{6}{5}.$

$7/6$ Completed the well drilling job started on $\frac{6}{25}$ and billed

customer for the remaining balance due.

$\frac{7}{12}$ Bid a third job for a contract price of $$15,750$ and started the

job immediately.

$7/16$ While working on the third job, a repair to equipment was

required, the cost of the repair was $$810$ and was paid in cash.

$\frac{7}{18}$ Received $$4,000$ partial payment from the first job that was

completed and billed last month on $6/21.$

$\frac{7}{27}$ Completed the third job that was started on $7/12.$ Billed the

customer for the contract price.