The circular flow model and GDP

In Fitlandia a $\$100 \text{ million}$dollar sign, 100, start text, space, m, i, l, l, i, o, n, end text skyscraper is constructed over two years. In year $1$1, $\$60\text{ million}$dollar sign, 60, start text, space, m, i, l, l, i, o, n, end text is spent on its construction, and in year two $\$40\text{ million}$dollar sign, 40, start text, space, m, i, l, l, i, o, n, end text is spent.