The United States has been consuming iron ore at the rate of $R(t)$ million metric tons per year at time $t$, where $t$ is measured in years since 1980 (that is, $t=0$ corresponds to the year 1980), and $$R(t) = 17.86e^{0.012t}.$$ Find a formula $T(t)$ for the total U.S. consumption of iron ore, in millions of metric tons, from 1980 until time $t$.

$T(t) =$