X C r , s = X B A S E r , s ∗ ( 1 + ( P R I r , s , t − 1 ∗ E X R A T E r − W P s W P s ) ) e l x p r 1 ∗ ( 1 + ( P R I r , s , t − 1 ∗ E X R A T E r − W P s W P s − P R I r , s , t − 2 ∗ E X R A T E r , t − 1 − W P r , t − 1 W P r , t − 1 ∗ e l a s t r p r s ) ) e l x p r 2 {\displaystyle XC_{r,s}=XBASE_{r,s}*(1+({\frac {PRI_{r,s,t-1}*EXRATE_{r}-WP_{s}}{WP_{s}}}))^{elxpr1}*(1+({\frac {PRI_{r,s,t-1}*EXRATE_{r}-WP_{s}}{WP_{s}}}-{\frac {PRI_{r,s,t-2}*EXRATE_{r,t-1}-WP_{r,t-1}}{WP_{r,t-1}}}*\mathbf {elastrpr} _{s}))^{elxpr2}}
