



 
Hi Julie, Suppose your cost is $C and you want to add a profit amount of $P to arrive at the revenue generated $R = $C + $P. You want the profit to be 30% of the revenue generated so $P is 30% of $R or
thus
which is
or
Hence take your cost and add three sevenths of the cost to arrive at the price you charge your customer. Since 3/7 is approximately 0.43 another way to say this is to take your cost and multiply by 1.43 to arrive at the price you charge your customer. I hope this helps,  


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