Hi Minato,
The formula for the *gross profit ratio* is:
Gross Profit Ratio = Gross Profit / Net Sales
Let's use all the information we already have, plug them into the formula, and solve for the unknown variable:
0.20 = Gross Profit / $1,200,000.
$1,200,000 x 0.20 = Gross Profit
$240,000 = Gross Profit
Since we're trying to figure out cost of goods sold (COGS), let's think of another profit-related formula that includes COGS... this would be the formula for calculating gross profit, which is:
Gross Profit = Net Sales - COGS.
We know the amount of net sales and we've calculated gross profit, so we can plug in these numbers and solve for COGS:
$240,000 = $1,200,000 - COGS
COGS + $240,000 = $1,200,000
COGS = $1,200,000 - $240,000
COGS = 960,000