AB Ltd leases a computer for $24$ months. The lease payment is R$2250$ per month for the first year $2021$ and $2550$ for the second year $2022.$ The lease commenced on $1$ march $2021.$ Assume a $31$ december year end. The lease qualifies as a lease of a low value asset and qualifies for a recognition exemption. Calculate the lease expense as at $31$ december $2021.$