Gemstone Products located in New York City, is one of the world's largest producers of beauty and related products. The company's consolidated balance sheets for the $2016$ and $2015$ fiscal years included the following $($$ in thousands$)$:

$20162015$

Current assets:

Receivables, less allowances of $$131,565$ in $2016$ and $$87,165$ in $2015$ $ $459,500$ $ $440,300$

A disclosure note accompanying the financial statements reported the following $($$ in thousands$)$

Year Ended

$2016($In thousands$)2015($In thousands$)$

Calculation of account receivables, net:

Receivables $ $591,065$ $ $527,465$

Less: allowance for doubtful accounts $(122,945)(77,645)$

Less: reserve for product returns $(8,620)(9,520)$

Trade accounts receivable, net: $ $459,500$ $ $440,300$

Assume that the company reported bad debt expense in $2016$ of $$191,300$ and had products returned for credit totaling $$187,045($sales price$).$ Net sales for $2016$ were $$5,593,800($$ in thousands$).$

Required:

What is the amount of accounts receivable due from customers at the end of $2016$ and $2015?$

What amount of accounts receivable did Gemstone write off during $2016?$

What is the amount of Gemstone's gross sales for the $2016$ fiscal year?

Assuming that all sales are made on a credit basis, what is the amount of cash Gemstone collected from customers during the $2016$ fiscal year?