$3P + 4P + PP + PP = RQ2$

Or $30 + P + 40 + P + 10P + P + 10P + P = 100R + 10Q+2$

Or $24P + 70 = 100R + 10Q+ 2$

Or $20P + 70 + 4P = 100R + 10Q + 2$

The unit digit of the resultant is 2. It will be obtained when 4 is multiplied by P. So, P must be 3, or 8.

If P = 3, then: $24P + 70 = 24 \times 3 + 70 = 72 + 70 = 142$

If P = 8, then: $24P + 70 = 24 \times 8 + 70 = 192 + 70 = 262$

Arithmetic sum of 142 and 262 = $(142 + 262)/2 = 202$