Liability of partners in a partnership business

115% of 800 - 4/5 of 320 + 82% of 700 = ? – 102% of 500

17 , 37 , 79 , 165 , ? , 689

124, 180, 108, 198, ?, 220

What will come in place of the question mark (?) in the following series?

68, 76, 61, 85, ?, 98

If series II follows the same sequence pattern as series I shown below, determine the value of 'p'.

Series I: 40, 25, 30, 50, 105, 267.5

15, 90, 95, ?, 383, 766  

98, 89, 114, 50, 194, ?

79        86        76         89        73         ?

580 557 528 497 ? 419

32      48      96     ?     720     2520