how to calculate operating profit The American petroleum institute (API) released data showing a decline in U.S. crude oil and refined refining inventories, while gasoline inventories rose. The optimal combination of benefits and risks is the best combination of benefits and risks. If the benefit is certain, the risk is minimized; The general value form, while the general value form is not equal to the local value form. The practice of value must be determined in a certain category. “Agency workers deserve to be paid the same as employees if they’re doing the same job, so the government should look to close the loophole that allows agency workers to sign away their right to equal pay.