A country can provide two goods, sandwiches, and pizza ovens. The country has 50 units of labour to use each day. The chart below illustrates the amount of each good that can be produced by various amounts of labour. Labour used (units per day) Sandwiches ('000 per day) Pizza Ovens (# per day) 0 0 0 10 15 OR 3 20 27 OR 6 30 37 OR 9 40 45 OR 12 50 50 OR 15

a. create a table showing the efficient combinations of sandwiches and pizza ovens that can be produced in one day