Heat and Mass Transfer

A refrigerated cold store wall has dimensions $4.0\text{ m} \times 6.0\text{ m}$ (area $A = 24.0\text{ m}^2$) and consists of an inner layer of polyurethane foam ($x_1 = 0.10\text{ m}$, $k_1 = 0.025\text{ W/(m}\cdot\text{K)}$) and an outer layer of brick masonry ($x_2 = 0.15\text{ m}$, $k_2 = 0.60\text{ W/(m}\cdot\text{K)}$). The inside foam surface is at $T_{s,1} = -18.0^\circ\text{C}$ and the outside brick surface is at $T_{s,2} = 32.0^\circ\text{C}$. The rate of heat ingress through the wall in Watts ($\text{W}$) is ________ (round off to one decimal place).