During Year $8,$ Pacilio Security Services experienced the following transactions:

Paid the salaries payable from Year $7.$

Purchased equipment and a van for a lump sum of $$36,000$ cash on January $2,$ Year $8.$ The equipment was appraised for $$10,000$ and the van was appraised for $$30,000.$

Paid $$9,000$ on May $1,$ Year $8,$ for one year$$s office rent in advance.

Purchased $$300$ of supplies on account.

Purchased $120$ alarm systems at a cost of $$280$ each. Paid cash for the purchase.

After numerous attempts to collect from customers, wrote off $$2,350$ of uncollectible accounts receivable.

Sold $115$ alarm systems for $$580$ each. All sales were on account.