Installment method of accounting to recognize income in its financial statement. Some pertinent data relating to this method of counting include:

Installment of sales 750,000 900,000

Cost of Installment Sales 450,000 630,000

Gross Profit 300,000 270,000

Collections during year

On 2017 Sales 250,000 250,000

On 2018 Sales 300,000

What amount of realized gross profit should be reported on the income statement for 2018?

The answer is 190,000... I am not sure how we got to that.