As a dietitian, your patient is on a low sodium diet (less than 1,100 mg of sodium per meal). she has a breakfast of orange juice, 2 eggs, 2 slices of toast with butter on each, and coffee. how much sodium did the patient have for breakfast?

You need a table with the content of sodium per serving.

This is the table:

butter    1 pat           41mg

coffe      250 ml        0

eggs      1 serving    60mg

toast      1 slice        170mg

orange
juice       250 ml       4 mg

With that table you can calculate the content of sodium in the breakfast, this way:

 
orange juice: 1 * 41 mg = 4 mg
2 eggs: 2*60mg = 120 mg
2 slices of toast with butter on each: 2 * ( 170mg+41mg) = 422mg
and coffee: 1 *0 = 0

The total sodium ingested is: 4 mg + 120 mg + 422 mg = 546 mg

546 mg

With a continuous thought process.