Diamond, Inc. had the following transactions during June:

Performed services for $ 4,000 on account;

received cash on account, $ 4,000;

paid $ 800 for repair expense;

paid $1,500 to a supplier that it owed from the previous month.

What is the combined effect on Cash of these June transactions?

A. $4,000 increase

B. $2,300 decrease

C. $1,700 decrease

D. $1,700 increase