Makamba Ltd$$s production data extract for the month of January $2023.$

Materials Information:

Standard usage $-1020$ units at P$4$ per unit

Actual usage $-1350$ units

Actual purchased $-1500$ units at P$3\mathrm{.}80$ per unit

Labour Information:

Standard hours $-340$ hours t P$12$ per hour

Actual hours $-310$ hours @ P$12\mathrm{.}10$ per hour

Compute the following:

NB: Compare the variance whether favorable or unfavorable.

a$.$ Material usage variance $[4$ marks$]$

b$.$ Material purchase price variance $[4$ marks$]$

c$.$ Material quantity variance. $[4$ marks$]$

d$.$ Labor rate efficiency variance $[4$ marks$]$

e$.$ Labour rate variance $[4$ marks$]$