The survival food plan

Medical student Jonas bought the latest iPhone model. Next money transfer from his parents will come after one week, so he has to prepare survival food plan. The table shows the nutritional components of five foods in grams per $100g,$ their costs per $100g,$ and the minimum weekly requirements for an adult $($in grams$).$

$\backslash$table$[[,\backslash$table$[[$Wholemeal$],[$bread$]],$Margarine,Cheese,$\backslash$table$[[$Breakfast$],[$cereal$]],\backslash$table$[[$Diet snack$],[$bar$]],\backslash$table$[[$Weekly adult$],[$requirements $(g)$