Consider four price promotion campaigns, where all three periods are of the same duration (3 weeks). The selling price per unit is $5, and the contribution per unit is $3.

Week		sales (Campaign 1)	sales (Campaign 2)	sales (Campaign 3)	sales (Campaign 4)
Baseline	1	969	969	929	1098
	2	979	1269	779	1249
	3	1349	1139	1039	1229
Promotion	5	1269	2119	1869	2359
	6	1539	1639	1679	2379
	7	1600	2209	1749	2419
Post promotion	9	1000	600	1078	450
	10	1400	700	1100	700
	12	1200	450	1209	250

Based on the information contained in the above table and considering that there is 20% price deduction for the Campaign 4, calculate the net contribution to profit (contribution foregone from baseline sales and contribution from incremental sales) and evaluate whether the price promotion is profitable for the Campaign 4