250 envelopes: $175 (+$40 with window)

500 envelopes: $250 (+$40 with window)

1000 envelopes: $326 (+$40 with window)

2,500 envelopes: $503 (+$40 with window)

5,000 envelopes: $755 (+$70 with window)

10,000 envelopes: $1,510 (+$150 with window)

15,000 envelopes: $1,820 (+$170 with window)

20,000 envelopes: $2,102 (+$250 with window)

15,000 envelopes: $2,324 (+$300 with window)