Photon Technologies, Inc., a manufacturer of batteries for mobile phones, signed a contract with a large electronics manufacturer to produce three models of lithium-ion battery packs for a new line of phones. The contract calls for the following:

Battery Pack	Production Quantity
PT-100	200,000
PT-200	100,000
PT-300	150,000

Photon Technologies can manufacture the battery packs at manufacturing plants located in the Philippines and Mexico. The unit cost of the battery packs differs at the two plants because of differences in production equipment and wage rates. The unit costs for each battery pack at each manufacturing plant are as follows:

	Plant
Product	Philippines	Mexico
PT-100	$0.95	$0.98
PT-200	$0.98	$1.06
PT-300	$1.34	$1.15

The PT-100 and PT-200 battery packs are produced using similar production equipment available at both plants. However, each plant has a limited capacity for the total number of PT-100 and PT-200 battery packs produced. The combined PT-100 and PT-200 production capacities are 175,000 units at the Philippines plant and 160,000 units at the Mexico plant. The PT-300 production capacities are 75,000 units at the Philippines plant and 100,000 units at the Mexico plant. The cost of shipping from the Philippines plant is $0.21 per unit, and the cost of shipping from the Mexico plant is $0.08 per unit.

(a)

Develop a linear program that Photon Technologies can use to determine how many units of each battery pack to produce at each plant to minimize the total production and shipping cost associated with the new contract. If the constraint is one, enter "1". If the amount is zero, enter "0".

Let	P1	=	number of PT-100 battery packs produced at the Philippines plant
	P2	=	number of PT-200 battery packs produced at the Philippines plant
	P3	=	number of PT-300 battery packs produced at the Philippines plant
	M1	=	number of PT-100 battery packs produced at the Mexico plant
	M2	=	number of PT-200 battery packs produced at the Mexico plant
	M3	=	number of PT-300 battery packs produced at the Mexico plant

Min

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

s.t.

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

=

____ Production PT-100

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

=

____ Production PT-200

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

=

____ Production PT-300

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

____ Capacity Phi PT-100 & 200

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

____ Capacity Mex PT-100 & 200

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

____ Capacity Phi PT-300

____ P1

+

____ P2

+

____ P3

+

____ M1

+

____ M2

+

____ M3

____ Capacity Mex PT-300

P1, P2, P3, M1, M2, M3 0

(b)

Solve the linear program developed in part (a), to determine the optimal production plan. If the amount is zero, enter "0".

	Qty Produced
	Phillipines	Mexico
PT-100
PT-200
PT-300

Total Cost = $____

(c)

Use sensitivity analysis to determine how much the production and/or shipping cost per unit would have to change to produce additional units of the PT-100 in the Philippines plant.

If required, round your answer to two decimal digits.

At least $____ / unit.

(d)

Use sensitivity analysis to determine how much the production and/or shipping cost per unit would have to change to produce additional units of the PT-200 in the Mexico plant.

If required, round your answer to two decimal digits.

At least $____ / unit.