Hesson Properties, Inc -Refer to the Figure Hesson Properties,Inc

Hesson Properties, Inc.The following transactions occurred during June:
$\begin{array}{ll}\text { June 1 } & \text { The company purchased two new maintenance carts on account at } \$ 750 \text { each. } \\&\text { Payment is due in } 30 \text { days. } \\\text { June } 8 &\text { The company accepted } \$ 500 \text { of advance payments from customers for service } \\&\text { to be provided next month. }\\\text { June } 15 & \text { The company received the utility bill for } \$ 300 \text {. Payment is due in } 30 \text { days. } \\\text { June } 20 & \text { The company billed customers } \$ 1,500 \text { for services provided. Payment is due in } \\&\text { 30 days. }\\\text { June } 30 & \text { The company received } \$ 500 \text { from customers who were billed earlier. }\end{array}$
-Refer to the figure Hesson Properties,Inc.How much is still owed to the company by its customers at the end of the month?

A) $0
B) $500
C) $1,000
D) $1,500