The total estimated value of the contract can be calculated based on the unit prices provided in the bid tabulation matrix. For #10 window envelopes, the unit price is $53.84 per thousand, and the estimated total quantity is 69,000, resulting in a total price of $3,714.96. For #10 non-window envelopes, the unit price is $53.84 per thousand, and the estimated total quantity is 58,000, resulting in a total price of $3,122.72. For the letterhead, the unit price is $158.57 per box, and the estimated total quantity is 12 boxes, resulting in a total price of $1,902.84. For #9 window envelopes, the unit price is $53.84 per thousand, and the estimated total quantity is 2,500, resulting in a total price of $134.60. For #9 non-window envelopes, the unit price is $53.84 per thousand, and the estimated total quantity is 11,000, resulting in a total price of $592.24. The total estimated value of the contract would be the sum of these individual prices, which is $9,467.36.