Steel mills in three cities produce the following amounts of steel:

Location	Weekly Production (tons)
A. Bethlehem	180
B. Birmingham 260	260
C. Gary	310
	Total 740

These mills supply steel to four cities, where manufacturing plants have the following demand:

Location	Weekly Demand (tons)
1. Detroit	160
2. St. Louis	120
3. Chicago	170
4. Norfolk	220
	Total 670

	TO
FROM	1	2	3	4
	$130	$90	$140	$170
	$120	$110	$70	$100
	$180	$130	$100	$210

Because of a truckers strike, shipments are prohibited from Birmingham to Chicago. Solve this problem by Least Method Cost Method.