The summation of all the costs in any period is shown in Figure 31.6.
Figure 31.6 clearly shows the effect of the anticipated delays in payment of certificates and
settlement of contractor’s accounts. For example, material valued at 118 in period 2 is paid to
the contractor after one month in period 3 (part of the 331, which is 90% of 368, the total
value of period 2), and is paid to the supplier by the contractor in period 4 after the twomonth
delay period.