Tom wants to make an omelet for breakfast. usually, he makes omelets for his family of four and uses a recipe that calls for 10 eggs, 4.8 grams of butter, 3 tablespoons of pepper, and 1 teaspoon of salt. however, today tom is only making an omelet for himself using $e$ eggs, $b$ grams of butter, $p$ tablespoons of pepper, and $s$ teaspoons of salt. what is $e+b+p+s$ expressed as a decimal? assume all four family members eat the same sized omelettes.