Flour is 100. Everything else is a percent of the flour.
Add the percentages, including 100 for the flour. Flour weight is total dough weight times 100 divided by that sum. Water, salt, oil, and yeast are the flour weight times each percent. Four balls at 250 grams is 1,000 grams of dough. At 65 percent hydration, 2 percent salt, 3 percent oil, and 1 percent yeast, the percentages sum to 171. Flour is 584.80 grams, water is 380.12 grams, salt is 11.70 grams, oil is 17.54 grams, and yeast is 5.85 grams. Those grams are the formula. A scale is what makes them real. This page does not invent a house recipe.