Carbondale Company Had the Following Data Available for the Last

Carbondale Company had the following data available for the last six months:
$$\begin{array} { | l | l | l | } \hline \text { Beg, inventory } & 10 \text { units } & \$ 55 \text { per unit } \\\hline \text { Purchase, } 3 / 1 & 30 \text { units } & \$ 60 \text { per unit } \\\hline \text { Sale, } 4 / 1 & 25 \text { units } & \$ 100 \text { per unit } \\\hline \text { Purchase, } 5 / 1 & 25 \text { units } & \$ 65 \text { per unit } \\\hline \text { Sale, } 6 / 1 & 20 \text { units } & \$ 100 \text { per unit } \\\hline\end{array}$$
Operating expenses are $2,000 per month. The income tax rate is 30%.
Required:
1. Compute Cost of Goods Sold for the six months ending June 30 using:
a. FIFO perpetual
b. LIFO perpetual
2. How much will the company save in income taxes if they use LIFO instead of FIFO?