A consumer only eats chicken and salad. Chicken has 250 calories and 10 units of vitamins, and a salad has 100 calories and 30 units of vitamins. Their doctor's instructions are that they must eat no more than 2000 calories and consume at least 150 units of vitamins per day. Suppose they can buy a serving of salad for $2 and a chicken for $6. There are $26 per day in the food budget. Determine the constraints they are facing. How many salads will they buy? Calculation and Explain in detail