Your employer has information regarding the gross revenue (in 10 Rand) from the sale of a given number of items, as shown in the table. You will lose your job unless you can make an accurate estimate of the amount that must be sold (not necessarily in multiples of 100000) so that the largest revenue is obtained. Make a recommendation by utilising the Lagrange method. (Hint: Treat the number of items sold in multiples of 100 000.) Items sold 200.000 300.000 100.000 500.000 Revenue 11.8 19.4 20.0 16.7 4