The following events apply to East Italia Industries, for the $2020$ accounting period, its first year of operations:

$1)$ The business issued $$51,000$ of common stock to its stockholders.

$2)$ Services were provided to customers for $$30,000$ cash.

$3)$ Services were provided to customers for $$20,000$ on account.

$4)$ The business received $$30,000$ cash from a Notes Payable.

$5)$ Operating expenses of $$27,000$ were incurred and paid in cash.

Calculate the amount of total liabilities at the end of $2020.$