The port folio value decreases by _____??

Example: A manager takes a long position in the 30-year bond by 5M and in the 10-year bond by $8M, and takes a short position in the 5-year bond by $16M. If the interest rate is decreased by 1bp, how much of the bond portfolio value changes? Suppose DVO1's of the 30-year, 10-year, and 5-year bonds are 0.10, 0.04, and 0.06, respectively. The portfolio value