After establishing the response factor of the instrument, the researcher collected 13.97 g of spinach, homogenized the sample, and extracted the DDT using an established method, producing a 3.87 mL solution containing an unknown amount of extracted DDT. The researcher then prepared a sample for analysis that contained 0.500 mL of the unknown DDT solution and 1.25 mL of 10.37 mg/L chloroform, which was diluted to a final volume of 25.00 mL. The sample was analyzed using GCMS, producing peak areas of 7583 and 15019 for the DDT and chloroform, respectively. Required:

Calculate the amount of DDT in the spinach sample. Express the final answer as milligrams of DDT per gram of spinach.