The Following Data Are Available for the Month of March $\text {March 1 balance}$

The following data are available for the month of March: $\text {March 1 balance}$ $\quad 20$ $\text {units at \(\$ 15\) each}$
$\text {March 10 purchase}$ $\quad 40$ $\text {units at \(\$ 16\) each}$
$\text {March 17 purchase}$ $\quad 30$ $\text {units at \(\$ 17.50\) each}$
$\text {March 30 purchase }$ $\quad 25$$\text {units at \(\$ 18\) each}$ On March 31, 35 units are on hand.
Calculate cost of goods sold under the following methods:
a)FIFO b)weighted-average (round per unit cost to the nearest cent, round final answer to the nearest dollar, assume periodic inventory system)